Merge branch 'rails5-fix-48142' into 'master'

Rails5 fix Admin::HooksController

Closes #48142

See merge request gitlab-org/gitlab-ce!20017

app/controllers/admin/hooks_controller.rb

@@ -9,7 +9,7 @@ class Admin::HooksController < Admin::ApplicationController
   end
 
   def create
-    @hook = SystemHook.new(hook_params)
+    @hook = SystemHook.new(hook_params.to_h)
 
     if @hook.save
       redirect_to admin_hooks_path, notice: 'Hook was successfully created.'

changelogs/unreleased/rails5-fix-48142.yml

+---
+title: Rails5 fix Admin::HooksController
+merge_request: 20017
+author: Jasper Maes
+type: fixed