Set maxWorkers on eslint-plugin-mui-x

Author: bernardobelchior

packages/eslint-plugin-mui-x/vitest.config.node.mts

@@ -3,5 +3,6 @@ import { defineConfig } from 'vitest/config';
 export default defineConfig({
   test: {
     environment: 'node',
+    maxWorkers: 1,
   },
 });