Merge pull request #31055 from y-yagi/show_request_forgery_protection_methods_in_api_doc

Show `RequestForgeryProtection` methods in api doc  [ci skip]

actionpack/lib/action_controller/metal/request_forgery_protection.rb

@@ -248,6 +248,7 @@ def handle_unverified_request # :doc:
         "If you know what you're doing, go ahead and disable forgery " \
         "protection on this action to permit cross-origin JavaScript embedding."
       private_constant :CROSS_ORIGIN_JAVASCRIPT_WARNING
+      # :startdoc:
 
       # If `verify_authenticity_token` was run (indicating that we have
       # forgery protection enabled for this request) then also verify that