Bump nokogiri from 1.16.2 to 1.18.4

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.16.2 to 1.18.4.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.16.2...v1.18.4)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -233,7 +233,7 @@ GEM
     marcel (1.0.4)
     method_source (1.0.0)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.5)
+    mini_portile2 (2.8.8)
     minitest (5.22.2)
     multi_xml (0.6.0)
     nenv (0.3.0)
@@ -249,7 +249,7 @@ GEM
     net-smtp (0.4.0.1)
       net-protocol
     nio4r (2.7.0)
-    nokogiri (1.16.2)
+    nokogiri (1.18.4)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     notiffany (0.1.3)
@@ -287,7 +287,7 @@ GEM
     public_suffix (5.0.4)
     puma (6.4.2)
       nio4r (~> 2.0)
-    racc (1.7.3)
+    racc (1.8.1)
     rack (2.2.8.1)
     rack-protection (3.2.0)
       base64 (>= 0.1.0)