Update dependency nokogiri to v1.18.8 [SECURITY]

Author: renovate[bot]

Gemfile.lock

@@ -315,7 +315,7 @@ GEM
       net-protocol
     netrc (0.11.0)
     nio4r (2.7.4)
-    nokogiri (1.18.7)
+    nokogiri (1.18.8)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     notiffany (0.1.3)