chore(release): update CHANGELOG.md

Author: abbesBenayache

cli/CHANGELOG.md

@@ -6,7 +6,6 @@
 ### Added
 
 * add support for arbitrum-mainnet ([#221](https://github.com/iExecBlockchainComputing/iapp/issues/221)) ([60b339c](https://github.com/iExecBlockchainComputing/iapp/commit/60b339cb29df8f13922ccb9f48fd9bc5356bd252))
-* add support for arbitrum-mainnet (WIP) ([bdb5685](https://github.com/iExecBlockchainComputing/iapp/commit/bdb5685f8efe768036e2cd224587396f93e9b5e8))
 
 ## [1.0.0-beta.3](https://github.com/iExecBlockchainComputing/iapp/compare/iapp-v1.0.0-beta.2...iapp-v1.0.0-beta.3) (2025-07-29)