Add changelog entry for PR 394

Author: tpvasconcelos

docs/reference/changelog.md

@@ -36,6 +36,7 @@ Unreleased changes
 - Fix the test suite's compatibility with the latest pytest release ({gh-pr}`384`)
 - Use the official `astral-sh/setup-uv` action to install and cache `uv` in CI ({gh-pr}`386`)
 - Let `uv` manage the Python interpreter and virtual environment in CI ({gh-pr}`393`)
+- Remove the stale `requirements/*.txt` glob from the CI cache key, left over from the migration to PEP 735 dependency groups ({gh-pr}`394`)
 
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