chore(content): move headings to includes

Author: thekaveman

_includes/about.html

@@ -1,3 +1,5 @@
+<h2>What is this site?</h2>
+
 <p>
     This is Cal-ITP's
     <a href="https://docs.github.com/en/pages/getting-started-with-github-pages/about-github-pages#types-of-github-pages-sites">

_includes/repos/index.html

@@ -1,3 +1,5 @@
+<h2>Browse our projects</h2>
+
 <div class="repo-list">
 {% assign repos = site.data.repos | sort: "updated_at" | reverse %}
 {% for repo in repos %}

index.html

@@ -2,10 +2,6 @@
 layout: default
 ---
 
-<h2>What is this site?</h2>
-
 {% include about.html %}
 
-<h2>Browse our projects</h2>
-
 {% include repos/index.html %}