Bump nokogiri from 1.18.7 to 1.18.8 in the bundler group (#3438)

Author: thomasleese

Gemfile.lock

@@ -383,9 +383,9 @@ GEM
       net-protocol
     nio4r (2.7.4)
     nkf (0.2.0)
-    nokogiri (1.18.7-arm64-darwin)
+    nokogiri (1.18.8-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.7-x86_64-linux-gnu)
+    nokogiri (1.18.8-x86_64-linux-gnu)
       racc (~> 1.4)
     notifications-ruby-client (6.2.0)
       jwt (>= 1.5, < 3)