Add changelog

Author: sus-pe

changelog/12625.improvement.rst

@@ -1,2 +1,4 @@
 Conditionally ignore collection of setuptools artifacts dirnames only if the
-directories reside inside a setuptools project, i.e. `setup.cfg`, is present, etc.
+directories reside inside a setuptools project, i.e. `setup.cfg` is present alongside
+a `setup.py` or a `pyproject.toml` with setuptools configuration inside.
+You can use the new `--collect-in-build` to force collection of ignored directories.