Show flash notice when Git Hooks are updated successfully

CHANGELOG-EE

@@ -9,6 +9,7 @@ v 8.9.0 (unreleased)
   - Distribute RepositoryUpdateMirror jobs in time and add exclusive lease on them by project_id
   - [Elastic] Move ES settings to application settings
   - Disable mirror flag for projects without import_url
+  - Show flash notice when Git Hooks are updated successfully
   - [Elastic] Project members with guest role can't access confidential issues
 
 v 8.8.5

app/controllers/admin/git_hooks_controller.rb

@@ -10,7 +10,7 @@ class Admin::GitHooksController < Admin::ApplicationController
     @git_hook.update_attributes(git_hook_params.merge(is_sample: true))
 
     if @git_hook.valid?
-      redirect_to admin_git_hooks_path
+      redirect_to admin_git_hooks_path, notice: 'Git Hooks updated successfully.'
     else
       render :index
     end

app/controllers/projects/git_hooks_controller.rb

@@ -17,7 +17,7 @@ class Projects::GitHooksController < Projects::ApplicationController
     @git_hook.update_attributes(git_hook_params)
 
     if @git_hook.valid?
-      redirect_to namespace_project_git_hooks_path(@project.namespace, @project)
+      redirect_to namespace_project_git_hooks_path(@project.namespace, @project), notice: 'Git Hooks updated successfully.'
     else
       render :index
     end