docs(repo): Add YouTube to README (#14833)

Co-authored-by: dave | d1onys1us <13951458+d1onys1us@users.noreply.github.com>

README.md

@@ -14,6 +14,7 @@
 
 [![Twitter Follow](https://img.shields.io/twitter/follow/taikoxyz?style=social)](https://twitter.com/taikoxyz)
 [![Discord](https://img.shields.io/discord/984015101017346058?color=%235865F2&label=Discord&logo=discord&logoColor=%23fff)](https://discord.gg/taikoxyz)
+[![YouTube](https://img.shields.io/youtube/channel/subscribers/UCxd_ARE9LtAEdnRQA6g1TaQ)](https://www.youtube.com/@taikoxyz)
 [![GitPOAP Badge](https://public-api.gitpoap.io/v1/repo/taikoxyz/taiko-mono/badge)](https://www.gitpoap.io/gh/taikoxyz/taiko-mono)
 [![License](https://img.shields.io/github/license/taikoxyz/taiko-mono)](https://github.com/taikoxyz/taiko-mono/blob/main/LICENSE.md)