fix(backend): add missing kind definition for admin endpoints to improve security

packages/backend/src/server/api/endpoints/admin/federation/update-instance.ts

@@ -14,6 +14,8 @@ import { ModerationLogService } from '@/core/ModerationLogService.js';
 export const meta = {
 	tags: ['admin'],
 
+	kind: 'write:admin',
+
 	requireCredential: true,
 	requireModerator: true,
 } as const;