Build(deps): Bump nokogiri from 1.15.3 to 1.15.4

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.15.3 to 1.15.4.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.15.3...v1.15.4)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile

@@ -106,7 +106,7 @@ gem 'iso_country_codes', '~> 0.7.8'
 gem 'mail', '~> 2.8.1'
 gem 'maxmind-db', '~> 1.0.0'
 gem 'mahoro', '~> 0.5'
-gem 'nokogiri', '~> 1.15.3'
+gem 'nokogiri', '~> 1.15.4'
 gem 'open4', '~> 1.3.0'
 gem 'rack', '~> 2.2.8'
 gem 'rack-utf8_sanitizer', '~> 1.9.0'

Gemfile.lock

@@ -322,7 +322,7 @@ GEM
     mime-types-data (3.2023.0218.1)
     mini_magick (4.12.0)
     mini_mime (1.1.2)
-    mini_portile2 (2.8.2)
+    mini_portile2 (2.8.4)
     mini_racer (0.8.0)
       libv8-node (~> 18.16.0.0)
     minitest (5.18.1)
@@ -347,16 +347,16 @@ GEM
     net-ssh-gateway (2.0.0)
       net-ssh (>= 4.0.0)
     nio4r (2.5.9)
-    nokogiri (1.15.3)
+    nokogiri (1.15.4)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.15.3-aarch64-linux)
+    nokogiri (1.15.4-aarch64-linux)
       racc (~> 1.4)
-    nokogiri (1.15.3-arm64-darwin)
+    nokogiri (1.15.4-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.15.3-x86_64-darwin)
+    nokogiri (1.15.4-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.15.3-x86_64-linux)
+    nokogiri (1.15.4-x86_64-linux)
       racc (~> 1.4)
     oink (0.10.1)
       activerecord
@@ -612,7 +612,7 @@ DEPENDENCIES
   net-protocol (~> 0.1.3)
   net-ssh (~> 7.2.0)
   net-ssh-gateway (>= 1.1.0, < 3.0.0)
-  nokogiri (~> 1.15.3)
+  nokogiri (~> 1.15.4)
   oink (~> 0.10.1)
   open4 (~> 1.3.0)
   pg (~> 1.5.3)