Bump nokogiri from 1.16.5 to 1.18.3

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.16.5 to 1.18.3.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/v1.18.3/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.16.5...v1.18.3)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: direct:production
...

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

Gemfile.lock

@@ -99,13 +99,13 @@ GEM
       middleman-core (>= 3.2)
       rouge (~> 3.2)
     mini_mime (1.1.2)
-    mini_portile2 (2.8.6)
+    mini_portile2 (2.8.8)
     minitest (5.19.0)
     multi_xml (0.6.0)
     neat (1.7.2)
       bourbon (>= 4.0)
       sass (>= 3.3)
-    nokogiri (1.16.5)
+    nokogiri (1.18.3)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     padrino-helpers (0.15.1)
@@ -116,7 +116,7 @@ GEM
     parallel (1.22.1)
     parslet (2.0.0)
     public_suffix (4.0.7)
-    racc (1.7.3)
+    racc (1.8.1)
     rack (2.2.9)
     rack-contrib (2.5.0)
       rack (< 4)