chore: update commonjs loading docs (#19904)

Author: sigmaSd

ext/node/polyfills/README.md

@@ -86,7 +86,7 @@ are stable:
 modules. It also sets supported globals.
 
 ```ts
-import { createRequire } from "https://deno.land/std@$STD_VERSION/node/module.ts";
+import { createRequire } from "node:module";
 
 const require = createRequire(import.meta.url);
 // Loads native module polyfill.