Update nokogiri to version 1.19.1

Author: depfu[bot]

Gemfile.lock

@@ -117,7 +117,7 @@ GEM
     mysql2 (0.5.7)
       bigdecimal
     nenv (0.3.0)
-    nokogiri (1.18.10)
+    nokogiri (1.19.1)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     notiffany (0.1.3)