fix: give project_default_strategy_write the ability to update the de…

…fault strategy

This appears to have been an oversight in the original implementation
of this endpoint. This seems to be the primary point of this
permission. Additionally, the docs mention that this permission should
allow you to do just that.

src/lib/features/project-environments/environments.ts

@@ -5,6 +5,7 @@ import {
     type IUnleashServices,
     serializeDates,
     UPDATE_PROJECT,
+    PROJECT_DEFAULT_STRATEGY_WRITE,
 } from '../../types';
 import type { Logger } from '../../logger';
 import type EnvironmentService from './environment-service';
@@ -105,7 +106,7 @@ export default class EnvironmentsController extends Controller {
             method: 'post',
             path: `${PREFIX}/:environment/default-strategy`,
             handler: this.updateDefaultStrategyForProjectEnvironment,
-            permission: UPDATE_PROJECT,
+            permission: [UPDATE_PROJECT, PROJECT_DEFAULT_STRATEGY_WRITE],
             middleware: [
                 openApiService.validPath({
                     tags: ['Projects'],