Add changelog entry for PR #323

Author: actions-user

docs/changelog.md

@@ -4,6 +4,7 @@ _This project uses semantic versioning_
 
 ## UNRELEASED
 
+- Bump actions/checkout from 4 to 5 in the actions group [#323](https://github.com/egraphs-good/egglog-python/pull/323)
 ## 11.0.0 (2025-08-08)
 
 - Change conversion between binary operators to consider converting both types [#320](https://github.com/egraphs-good/egglog-python/pull/320)