fix: Gemfile & Gemfile.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-REXML-6861566

Author: snyk-bot

Diff for: Gemfile

@@ -3,4 +3,4 @@
 ruby '~> 2.7.1'
 
 source 'https://rubygems.org'
-gem 'github-pages', group: :jekyll_plugins
+gem 'github-pages', '>= 229', group: :jekyll_plugins

Diff for: Gemfile.lock

@@ -1,46 +1,56 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (7.0.7.2)
+    activesupport (7.1.3.3)
+      base64
+      bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
+      connection_pool (>= 2.2.5)
+      drb
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
+      mutex_m
       tzinfo (~> 2.0)
-    addressable (2.8.1)
+    addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
+    base64 (0.2.0)
+    bigdecimal (3.1.8)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
-    coffee-script-source (1.11.1)
+    coffee-script-source (1.12.2)
     colorator (1.1.0)
     commonmarker (0.23.10)
-    concurrent-ruby (1.2.2)
-    dnsruby (1.61.9)
-      simpleidn (~> 0.1)
+    concurrent-ruby (1.2.3)
+    connection_pool (2.4.1)
+    dnsruby (1.72.1)
+      simpleidn (~> 0.2.1)
+    drb (2.2.1)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
     ethon (0.16.0)
       ffi (>= 1.15.0)
     eventmachine (1.2.7)
-    execjs (2.8.1)
-    faraday (2.7.4)
+    execjs (2.9.1)
+    faraday (2.8.1)
+      base64
       faraday-net_http (>= 2.0, < 3.1)
       ruby2_keywords (>= 0.0.4)
     faraday-net_http (3.0.2)
-    ffi (1.15.5)
+    ffi (1.16.3)
     forwardable-extended (2.6.0)
-    gemoji (3.0.1)
-    github-pages (228)
-      github-pages-health-check (= 1.17.9)
-      jekyll (= 3.9.3)
-      jekyll-avatar (= 0.7.0)
-      jekyll-coffeescript (= 1.1.1)
+    gemoji (4.1.0)
+    github-pages (231)
+      github-pages-health-check (= 1.18.2)
+      jekyll (= 3.9.5)
+      jekyll-avatar (= 0.8.0)
+      jekyll-coffeescript (= 1.2.2)
       jekyll-commonmark-ghpages (= 0.4.0)
-      jekyll-default-layout (= 0.1.4)
-      jekyll-feed (= 0.15.1)
+      jekyll-default-layout (= 0.1.5)
+      jekyll-feed (= 0.17.0)
       jekyll-gist (= 1.5.0)
-      jekyll-github-metadata (= 2.13.0)
+      jekyll-github-metadata (= 2.16.1)
       jekyll-include-cache (= 0.2.1)
       jekyll-mentions (= 1.6.0)
       jekyll-optional-front-matter (= 0.3.2)
@@ -67,28 +77,28 @@ GEM
       jekyll-theme-tactile (= 0.2.0)
       jekyll-theme-time-machine (= 0.2.0)
       jekyll-titles-from-headings (= 0.5.3)
-      jemoji (= 0.12.0)
-      kramdown (= 2.3.2)
+      jemoji (= 0.13.0)
+      kramdown (= 2.4.0)
       kramdown-parser-gfm (= 1.1.0)
       liquid (= 4.0.4)
       mercenary (~> 0.3)
       minima (= 2.5.1)
       nokogiri (>= 1.13.6, < 2.0)
-      rouge (= 3.26.0)
+      rouge (= 3.30.0)
       terminal-table (~> 1.4)
-    github-pages-health-check (1.17.9)
+    github-pages-health-check (1.18.2)
       addressable (~> 2.3)
       dnsruby (~> 1.60)
-      octokit (~> 4.0)
-      public_suffix (>= 3.0, < 5.0)
+      octokit (>= 4, < 8)
+      public_suffix (>= 3.0, < 6.0)
       typhoeus (~> 1.3)
     html-pipeline (2.14.3)
       activesupport (>= 2)
       nokogiri (>= 1.4)
     http_parser.rb (0.8.0)
-    i18n (1.14.1)
+    i18n (1.14.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.9.3)
+    jekyll (3.9.5)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -101,27 +111,27 @@ GEM
       pathutil (~> 0.9)
       rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
-    jekyll-avatar (0.7.0)
+    jekyll-avatar (0.8.0)
       jekyll (>= 3.0, < 5.0)
-    jekyll-coffeescript (1.1.1)
+    jekyll-coffeescript (1.2.2)
       coffee-script (~> 2.2)
-      coffee-script-source (~> 1.11.1)
+      coffee-script-source (~> 1.12)
     jekyll-commonmark (1.4.0)
       commonmarker (~> 0.22)
     jekyll-commonmark-ghpages (0.4.0)
       commonmarker (~> 0.23.7)
       jekyll (~> 3.9.0)
       jekyll-commonmark (~> 1.4.0)
       rouge (>= 2.0, < 5.0)
-    jekyll-default-layout (0.1.4)
-      jekyll (~> 3.0)
-    jekyll-feed (0.15.1)
+    jekyll-default-layout (0.1.5)
+      jekyll (>= 3.0, < 5.0)
+    jekyll-feed (0.17.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-gist (1.5.0)
       octokit (~> 4.2)
-    jekyll-github-metadata (2.13.0)
+    jekyll-github-metadata (2.16.1)
       jekyll (>= 3.4, < 5.0)
-      octokit (~> 4.0, != 4.4.0)
+      octokit (>= 4, < 7, != 4.4.0)
     jekyll-include-cache (0.2.1)
       jekyll (>= 3.7, < 5.0)
     jekyll-mentions (1.6.0)
@@ -192,25 +202,26 @@ GEM
       jekyll (>= 3.3, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    jemoji (0.12.0)
-      gemoji (~> 3.0)
+    jemoji (0.13.0)
+      gemoji (>= 3, < 5)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    kramdown (2.3.2)
+    kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.4)
-    listen (3.8.0)
+    listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.8.5)
+    mini_portile2 (2.8.6)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    minitest (5.19.0)
+    minitest (5.23.0)
+    mutex_m (0.2.0)
     nokogiri (1.15.6)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
@@ -219,14 +230,14 @@ GEM
       sawyer (~> 0.9)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.7)
+    public_suffix (5.0.5)
     racc (1.7.3)
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.8)
       strscan (>= 3.0.9)
-    rouge (3.26.0)
+    rouge (3.30.0)
     ruby2_keywords (0.0.5)
     rubyzip (2.3.2)
     safe_yaml (1.0.5)
@@ -238,25 +249,25 @@ GEM
     sawyer (0.9.2)
       addressable (>= 2.3.5)
       faraday (>= 0.17.3, < 3)
-    simpleidn (0.2.1)
+    simpleidn (0.2.2)
       unf (~> 0.1.4)
     strscan (3.1.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    typhoeus (1.4.0)
+    typhoeus (1.4.1)
       ethon (>= 0.9.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.8.2)
+    unf_ext (0.0.9.1)
     unicode-display_width (1.8.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  github-pages
+  github-pages (>= 229)
 
 RUBY VERSION
    ruby 2.7.1p83