update changelog (#500)

Author: urvisavla

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## [v23.0.1](https://github.com/stellar/stellar-rpc/compare/v23.0.0...v23.0.1)
+ - Bump soroban-env lib to v23.0.1 ([#499](https://github.com/stellar/stellar-rpc/pull/499)).
 
 ## [v23.0.0](https://github.com/stellar/stellar-rpc/compare/v22.1.5...v23.0.0): Protocol 23 Release