Bump nokogiri from 1.15.4 to 1.15.5

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.15.4 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@v1.15.4...v1.15.5)

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

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

Gemfile.lock

@@ -84,9 +84,9 @@ GEM
     middleman-syntax (3.3.0)
       middleman-core (>= 3.2)
       rouge (~> 3.2)
-    mini_portile2 (2.8.4)
+    mini_portile2 (2.8.5)
     minitest (5.16.3)
-    nokogiri (1.15.4)
+    nokogiri (1.15.5)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     padrino-helpers (0.15.1)
@@ -97,7 +97,7 @@ GEM
     parallel (1.22.1)
     parslet (2.0.0)
     public_suffix (5.0.0)
-    racc (1.7.1)
+    racc (1.7.3)
     rack (2.2.4)
     rack-test (0.6.3)
       rack (>= 1.0)