Fix Cypress tests on master (#26500)

e2e-tests/cypress/tests/integration/channels/plugins/demo_plugin/webhook_spec.js

@@ -32,6 +32,9 @@ describe('Demo plugin - Webhook events', () => {
             ServiceSettings: {
                 EnableGifPicker: true,
             },
+            FileSettings: {
+                EnablePublicLink: true,
+            },
         };
         cy.apiUpdateConfig(newSettings);