docs: Update CHANGELOG.md (#24750)

Author: aaronc

log/CHANGELOG.md

@@ -22,6 +22,8 @@ Each entry must include the Github issue reference in the following format:
 
 ## [Unreleased]
 
+## [v1.6.0](https://github.com/cosmos/cosmos-sdk/releases/tag/log/v1.6.0) - 2025-05-13
+
 * [#24720](https://github.com/cosmos/cosmos-sdk/pull/24720) add `VerboseModeLogger` extension interface and `VerboseLevel` configuration option for increasing log verbosity during sensitive operations such as upgrades.
 
 ## [v1.5.1](https://github.com/cosmos/cosmos-sdk/releases/tag/log/v1.5.1) - 2025-03-07