Update dependency nokogiri to v1.18.8 [SECURITY]

Author: renovate[bot]

Gemfile.lock

@@ -141,9 +141,9 @@ GEM
     net-smtp (0.5.0)
       net-protocol
     nio4r (2.7.4)
-    nokogiri (1.17.2-arm64-darwin)
+    nokogiri (1.18.8-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.17.2-x86_64-linux)
+    nokogiri (1.18.8-x86_64-linux-gnu)
       racc (~> 1.4)
     pry (0.15.2)
       coderay (~> 1.1)