Bump nokogiri from 1.18.3 to 1.18.4 (#788)

Author: dependabot[bot]

Gemfile.lock

@@ -289,7 +289,7 @@ GEM
     netrc (0.11.0)
     nio4r (2.7.3)
     nkf (0.2.0)
-    nokogiri (1.18.3)
+    nokogiri (1.18.4)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     octokit (9.1.0)