chore(release): update changelog

Author: abbesBenayache

CHANGELOG.md

@@ -7,7 +7,6 @@ All notable changes to this project will be documented in this file.
 
 ### Added
 
-* add support arbitrum mainnet ([7cf7580](https://github.com/iExecBlockchainComputing/web3telegram-sdk/commit/7cf7580810b8a70079bec34a014507f279ea7f97))
 * add support arbitrum mainnet ([7cf7580](https://github.com/iExecBlockchainComputing/web3telegram-sdk/commit/7cf7580810b8a70079bec34a014507f279ea7f97))
 
 ## [0.1.0-alpha.3](https://github.com/iExecBlockchainComputing/web3telegram-sdk/compare/web3telegram-v0.1.0-alpha.2...web3telegram-v0.1.0-alpha.3) (2025-07-31)