Update dependency nokogiri to v1.18.8 [SECURITY]

Author: renovate[bot]

Gemfile.lock

@@ -258,7 +258,7 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nio4r (2.7.4)
-    nokogiri (1.18.3)
+    nokogiri (1.18.8)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     os (1.1.4)