Update test script path (.js -> .mjs) in README

Author: weakish

README.md

@@ -91,7 +91,7 @@ We check the validity of our code examples marked with:
 Run the checks with:
 
 ```sh
-node scripts/test-examples.js
+node scripts/test-examples.mjs
 ```
 
 ### Markdown Hyperlink Tests
@@ -117,10 +117,10 @@ Here is an example on how to run the tests:
 
 ```sh
 # Tests all files
-node scripts/test-hrefs.js
+node scripts/test-hrefs.mjs
 
 # Or just a subset (glob pattern)
-node scripts/test-hrefs.js "pages/docs/manual/**/*.mdx"
+node scripts/test-hrefs.mjs "pages/docs/manual/**/*.mdx"
 ```
 
 ### Continous Integration