Bump nokogiri from 1.15.6 to 1.15.7

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.15.6 to 1.15.7.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.15.6...v1.15.7)

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

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

Gemfile.lock

@@ -31,13 +31,13 @@ GEM
     i18n (1.14.6)
       concurrent-ruby (~> 1.0)
     logger (1.6.1)
-    mini_portile2 (2.8.5)
+    mini_portile2 (2.8.8)
     minitest (5.25.1)
     mutex_m (0.2.0)
-    nokogiri (1.15.6)
+    nokogiri (1.15.7)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    racc (1.7.3)
+    racc (1.8.1)
     rake (13.2.1)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)