Update use-an-eslint-config-file.md

Author: dilanx

website/recipes/use-an-eslint-config-file.md

@@ -1,11 +1,9 @@
 # Use an ESLint config file
 
 ```js title="craco.config.js"
-const { ESLINT_MODES } = require('@craco/craco');
-
 module.exports = {
   eslint: {
-    mode: ESLINT_MODES.file,
+    mode: 'file',
   },
 };
 ```