Bump nokogiri from 1.14.3 to 1.15.6

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.14.3 to 1.15.6.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.14.3...v1.15.6)

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

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

Author: dependabot[bot]

Diff for: Gemfile.lock

@@ -78,12 +78,12 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
-    mini_portile2 (2.8.1)
+    mini_portile2 (2.8.5)
     mini_racer (0.3.1)
       libv8 (~> 8.4.255)
     minitest (5.19.0)
-    nokogiri (1.14.3)
-      mini_portile2 (~> 2.8.0)
+    nokogiri (1.15.6)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     nokogumbo (2.0.4)
       nokogiri (~> 1.8, >= 1.8.4)
@@ -92,7 +92,7 @@ GEM
       forwardable-extended (~> 2.6)
     posix-spawn (0.3.15)
     public_suffix (4.0.6)
-    racc (1.6.2)
+    racc (1.7.3)
     rainbow (3.0.0)
     rake (13.0.3)
     rb-fsevent (0.10.4)