Update README.md for X (Twitter) new brand guidelines (#14665)

* Update README.md for X (Twitter) new brand guidelines
* suggested changes

README.md

@@ -3,10 +3,10 @@
 [![Matrix Chat](https://img.shields.io/badge/Matrix%20-chat-brightgreen?style=plastic&logo=matrix)](https://matrix.to/#/#ethereum_solidity:gitter.im)
 [![Gitter Chat](https://img.shields.io/badge/Gitter%20-chat-brightgreen?style=plastic&logo=gitter)](https://gitter.im/ethereum/solidity)
 [![Solidity Forum](https://img.shields.io/badge/Solidity_Forum%20-discuss-brightgreen?style=plastic&logo=discourse)](https://forum.soliditylang.org/)
-[![Twitter Follow](https://img.shields.io/twitter/follow/solidity_lang?style=plastic&logo=twitter)](https://twitter.com/solidity_lang)
+[![X Follow](https://img.shields.io/twitter/follow/solidity_lang?style=plastic&logo=x)](https://X.com/solidity_lang)
 [![Mastodon Follow](https://img.shields.io/mastodon/follow/000335908?domain=https%3A%2F%2Ffosstodon.org%2F&logo=mastodon&style=plastic)](https://fosstodon.org/@solidity)
 
-You can talk to us on Gitter and Matrix, tweet at us on Twitter or create a new topic in the Solidity forum. Questions, feedback, and suggestions are welcome!
+You can talk to us on Gitter and Matrix, tweet at us on X (previously Twitter) or create a new topic in the Solidity forum. Questions, feedback, and suggestions are welcome!
 
 Solidity is a statically typed, contract-oriented, high-level language for implementing smart contracts on the Ethereum platform.