doc: update node prefix require.cache example

PR-URL: #44724
Reviewed-By: Geoffrey Booth <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Akhil Marsonya <[email protected]>
Reviewed-By: Darshan Sen <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: simoneb

doc/api/modules.md

@@ -720,7 +720,7 @@ const realFs = require('node:fs');
 const fakeFs = {};
 require.cache.fs = { exports: fakeFs };
 
-assert.strictEqual(require('node:fs'), fakeFs);
+assert.strictEqual(require('fs'), fakeFs);
 assert.strictEqual(require('node:fs'), realFs);
 ```