Update index.md

Author: woseK

public/content/roadmap/verkle-trees/index.md

@@ -57,7 +57,7 @@ Verkle tree testnets are already up and running, but there are still substantial
 
 - [Verkle Trees for Statelessness](https://verkle.info/)
 - [Dankrad Feist explain Verkle trees on PEEPanEIP](https://www.youtube.com/watch?v=RGJOQHzg3UQ)
-- [Guillaume Ballet explain verkle trees at ETHGlobal](https://www.youtube.com/watch?v=f7bEtX3Z57o)
+- [Guillaume Ballet explain Verkle trees at ETHGlobal](https://www.youtube.com/watch?v=f7bEtX3Z57o)
 - ["How Verkle trees make Ethereum lean and mean" by Guillaume Ballet at Devcon 6](https://www.youtube.com/watch?v=Q7rStTKwuYs)
 - [Piper Merriam on stateless clients from ETHDenver 2020](https://www.youtube.com/watch?v=0yiZJNciIJ4)
 - [Dankrad Fiest explains Verkle trees and statelessness on Zero Knowledge podcast](https://zeroknowledge.fm/episode-202-stateless-ethereum-verkle-tries-with-dankrad-feist/)