Fix wrong view being displayed when a webhook fails validation (#25464)

spec/controllers/admin/webhooks_controller_spec.rb

@@ -82,7 +82,7 @@ describe Admin::WebhooksController do
         end.to_not change(webhook, :url)
 
         expect(response).to have_http_status(:success)
-        expect(response).to render_template(:show)
+        expect(response).to render_template(:edit)
       end
     end