docs: update contributing

Author: alexander-akait

README.md

@@ -595,7 +595,7 @@ We welcome contributions!
 
 Please take a moment to read our contributing guidelines if you haven't yet done so.
 
-[CONTRIBUTING](./.github/CONTRIBUTING.md)
+[CONTRIBUTING](https://github.com/webpack/compression-webpack-plugin?tab=contributing-ov-file#contributing)
 
 ## License