Add more details to changelog

Author: saulshanabrook

docs/changelog.md

@@ -5,7 +5,8 @@ _This project uses semantic versioning_
 ## UNRELEASED
 
 - Add ability to parse egglog expressions into Python values [#319](https://github.com/egraphs-good/egglog-python/pull/319)
-- Support methods like  on expressions [#315](https://github.com/egraphs-good/egglog-python/pull/315)
+  - Deprecates `.eval()` method on primitives in favor of `.value` which can be used with pattern matching.
+- Support methods like on expressions [#315](https://github.com/egraphs-good/egglog-python/pull/315)
 - Automatically Create Changelog Entry for PRs [#313](https://github.com/egraphs-good/egglog-python/pull/313)
 - Upgrade egglog which includes new backend.
   - Fixes implementation of the Python Object sort to work with objects with dupliating hashes but the same value.