Bump nokogiri from 1.14.4 to 1.15.1

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.14.4 to 1.15.1.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.14.4...v1.15.1)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -159,10 +159,10 @@ GEM
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.18.0)
-    nokogiri (1.14.4)
-      mini_portile2 (~> 2.8.0)
+    nokogiri (1.15.1)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.14.4-x86_64-linux)
+    nokogiri (1.15.1-x86_64-linux)
       racc (~> 1.4)
     octokit (4.25.1)
       faraday (>= 1, < 3)