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

@@ -53,7 +53,7 @@ GEM
     lumberjack (1.2.4)
     memo_wise (1.7.0)
     method_source (1.0.0)
-    mini_portile2 (2.8.4)
+    mini_portile2 (2.8.5)
     multi_json (1.15.0)
     nanoc (4.12.18)
       addressable (~> 2.5)
@@ -91,7 +91,7 @@ GEM
     nanoc-redirector (0.4.1)
       nanoc (~> 4.9)
     nenv (0.3.0)
-    nokogiri (1.15.4)
+    nokogiri (1.15.5)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     notiffany (0.1.3)
@@ -107,7 +107,7 @@ GEM
       stringio
     public_suffix (5.0.3)
     pygments.rb (2.4.1)
-    racc (1.7.1)
+    racc (1.7.3)
     rack (3.0.8)
     rackup (2.1.0)
       rack (>= 3)