update CHANGELOG

Author: Technologicat

CHANGELOG.md

@@ -4,7 +4,7 @@
 
 - Minimum Python language version is now 3.8.
   - We support 3.8, 3.9, 3.10, 3.11, 3.12, and PyPy3 (language versions 3.8, 3.9, and 3.10).
-  - Python 3.6 and 3.7 support dropped, as these language versions have officially reached end-of-life.
+  - Python 3.6 and 3.7 support dropped, as these language versions have officially reached end-of-life. If you need `unpythonic` for Python 3.6 or 3.7, use version 0.15.2.
 
 
 **New**: