docs(CHANGES): Note GitHub actions and poetry packaging updates, clas…

…sifiers

CHANGES

@@ -34,10 +34,28 @@ $ pip install --user --upgrade --pre gp-libs
   dev dependency by using our existing rust-based `ruff` linter.
 
   [`ruff format`]: https://docs.astral.sh/ruff/formatter/
+- CI: Update action packages to fix warnings
+
+  - [dorny/paths-filter]: 2.7.0 -> 2.11.1
+
+  [dorny/paths-filter]: https://github.com/dorny/paths-filter
 
 ### Packaging
 
 - Move pytest configuration to `pyproject.toml` (#24)
+- Add Python 3.12 to trove classifiers
+- Packaging (poetry): Fix development dependencies
+
+  Per [Poetry's docs on managing dependencies] and `poetry check`, we had it wrong: Instead of using extras, we should create these:
+
+  ```toml
+  [tool.poetry.group.[group-name].dependencies]
+  dev-dependency = "1.0.0"
+  ```
+
+  Which we now do.
+
+  [Poetry's docs on managing dependencies]: https://python-poetry.org/docs/master/managing-dependencies/
 
 ## gp-libs 0.0.2 (2023-09-09)