fix(doc): fixed broken code of conduct link

Author: sumitparakh

README.md

@@ -86,7 +86,7 @@ nx test <app-name>
 ```
 ## Contributing
 
-🐍  All contributions are welcome. Make sure you follow the [code of conduct](CODE_OF_CONDUCT.MD) in this repository. 
+🐍  All contributions are welcome. Make sure you follow the [code of conduct](CODE_OF_CONDUCT.md) in this repository. 
 
 ## MIT License