Update CONTRIBUTING.md

Author: violetforest

CONTRIBUTING.md

@@ -28,7 +28,11 @@ There are some auxiliary components that aren't doing much besides aiding with t
 
 ## Learning Resources
 [Hic Et Nunc NFTs](https://leonnicholls.medium.com/hic-et-nunc-nfts-61743765b2ac?source=user_profile---------6----------------------------)
+
 [Hicdex: the Hic Et Nunc indexer](https://leonnicholls.medium.com/hicdex-the-hic-et-nunc-indexer-bd45f27a228f)
+
 [Hic Et Nunc Metadata](https://leonnicholls.medium.com/hic-et-nunc-metadata-40e594530e31)
+
 [Minters for Hic Et Nunc](https://leonnicholls.medium.com/minters-for-hic-et-nunc-8b244b3d7ce0?source=user_profile---------1----------------------------)
+
 [Hic Et Nunc Smart Contracts (Part 1)](https://leonnicholls.medium.com/hic-et-nunc-smart-contracts-part-1-e4ad5d0934b9)