Bump octokit from 5.6.1 to 6.0.0

Bumps [octokit](https://github.com/octokit/octokit.rb) from 5.6.1 to 6.0.0.
- [Release notes](https://github.com/octokit/octokit.rb/releases)
- [Changelog](https://github.com/octokit/octokit.rb/blob/main/RELEASE.md)
- [Commits](octokit/octokit.rb@v5.6.1...v6.0.0)

---
updated-dependencies:
- dependency-name: octokit
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -18,13 +18,13 @@ GEM
     faraday (2.6.0)
       faraday-net_http (>= 2.0, < 3.1)
       ruby2_keywords (>= 0.0.4)
-    faraday-net_http (3.0.0)
+    faraday-net_http (3.0.1)
     hashdiff (1.0.1)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     json (2.6.2)
     minitest (5.16.3)
-    octokit (5.6.1)
+    octokit (6.0.0)
       faraday (>= 1, < 3)
       sawyer (~> 0.9)
     parallel (1.22.1)