Bump nokogiri from 1.16.8 to 1.18.3

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.16.8 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@v1.16.8...v1.18.3)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -150,6 +150,7 @@ GEM
     matrix (0.4.2)
     method_source (1.1.0)
     mini_mime (1.1.5)
+    mini_portile2 (2.8.8)
     minitest (5.25.1)
     msgpack (1.7.2)
     mustermann (3.0.2)
@@ -166,17 +167,18 @@ GEM
     net-smtp (0.5.0)
       net-protocol
     nio4r (2.7.3)
-    nokogiri (1.16.8-aarch64-linux)
+    nokogiri (1.18.3)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.16.8-arm-linux)
+    nokogiri (1.18.3-aarch64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.16.8-arm64-darwin)
+    nokogiri (1.18.3-arm-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.16.8-x86-linux)
+    nokogiri (1.18.3-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.16.8-x86_64-darwin)
+    nokogiri (1.18.3-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.16.8-x86_64-linux)
+    nokogiri (1.18.3-x86_64-linux-gnu)
       racc (~> 1.4)
     parallel (1.26.3)
     parser (3.3.4.2)