Update README.md (#176)

Author: AlbertEinsteinTG

README.md

@@ -101,7 +101,7 @@ const openSource = {
 };
 ```
 
-You can get a github token as described [here](https://docs.github.com/en/github/authenticating-to-github/creating-a-personal-access-token). Give all permissions while generating token. Also add your `githubUserName` in the correct field inside `git_data_fetcher.js`.
+You can get a github token as described [here](https://docs.github.com/en/github/authenticating-to-github/creating-a-personal-access-token). Give all permissions while generating token. Also add your `githubUserName` in the correct field inside `git_data_fetcher.mjs`.
 Now, you need to run following command.
 
 **Warning:** Treat your tokens like passwords and keep them secret. When working with the API, use tokens as environment variables instead of hardcoding them into your programs.