Merge pull request #22116 from Devinsuit/v4-dev

Update Google sourcemap resources link

README.md

@@ -57,7 +57,7 @@ bootstrap/
     └── bootstrap.min.js
 ```
 
-We provide compiled CSS and JS (`bootstrap.*`), as well as compiled and minified CSS and JS (`bootstrap.min.*`). CSS [source maps](https://developer.chrome.com/devtools/docs/css-preprocessors) (`bootstrap.*.map`) are available for use with certain browsers' developer tools.
+We provide compiled CSS and JS (`bootstrap.*`), as well as compiled and minified CSS and JS (`bootstrap.min.*`). CSS [source maps](https://developers.google.com/web/tools/chrome-devtools/debug/readability/source-maps) (`bootstrap.*.map`) are available for use with certain browsers' developer tools.
 
 
 ## Bugs and feature requests