Link ProGuard rules in README

Author: Goooler

README.md

@@ -189,7 +189,7 @@ if(account != null){
 ```
 
 ## ProGuard
-MSAL uses reflection and generic type information stored in `.class` files at runtime to support various persistence and serialization related functionalities. Accordingly, library support for minification and obfuscation is limited. A default configuration is shipped with this library; please [file an issue](https://github.com/AzureAD/microsoft-authentication-library-for-android/issues/new/choose) if you find any issues.
+MSAL uses reflection and generic type information stored in `.class` files at runtime to support various persistence and serialization related functionalities. Accordingly, library support for minification and obfuscation is limited. [A default configuration](msal/consumer-rules.pro) is shipped with this library; please [file an issue](https://github.com/AzureAD/microsoft-authentication-library-for-android/issues/new/choose) if you find any issues.
 
 ## Support