README: Add reference of the pt-br translation

Author: RyuzakiKK

README.md

@@ -14,7 +14,7 @@ Keep your notes safe and secure with Note Crypt for Android!
 
 If you forget your password, the notes will be inaccessible.
 
-Thanks to [naofum](https://github.com/naofum) for the Japanese translation.
+Thanks to [naofum](https://github.com/naofum) for the Japanese translation and to [hanelore](https://github.com/hanelore) for the Brazilian Portuguese translation.
 
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