Bump nokogiri from 1.12.3 to 1.15.5

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.12.3 to 1.15.5.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.12.3...v1.15.5)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: indirect
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -37,13 +37,13 @@ GEM
       nokogiri (>= 1.5.9)
     method_source (1.0.0)
     minitest (5.14.4)
-    nokogiri (1.12.3-arm64-darwin)
+    nokogiri (1.15.5-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.12.3-x86_64-darwin)
+    nokogiri (1.15.5-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.12.3-x86_64-linux)
+    nokogiri (1.15.5-x86_64-linux)
       racc (~> 1.4)
-    racc (1.5.2)
+    racc (1.7.3)
     rack (2.2.8)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)