Add Peeranha link to outro

Author: elPiablo

pages/lessons/projects/4.mdx

@@ -943,7 +943,7 @@ With TDD:
 <Quiz quiz="lesson-4-quiz" />
 <br/><br/>
 
-You just did some amazing work, and you will do a great service to the web3 ecosystem by being conscious of the value of writing solid code. There’s lots more to explore in Academy, and we’re looking forward to seeing you in our final project in this ERC721 track where you’ll be *Connecting your TierNFT Smart Contract to a Frontend*. Why not dive into the forum in the mean time, and share your new found wisdom with our community.
+You just did some amazing work, and you will do a great service to the web3 ecosystem by being conscious of the value of writing solid code. There’s lots more to explore in Academy, and we’re looking forward to seeing you in our final project in this ERC721 track where you’ll be *Connecting your TierNFT Smart Contract to a Frontend*. Why not dive into the [forum](https://developerdao.peeranha.io/discussions/1372/testing-solidity-contracts) in the mean time, and share your new found wisdom with our community.
 
 Go forth, test, and prosper knowing you have confidence in the code you're
 deploying into the world.