Update README.rst

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

Author: cooperlees

README.rst

@@ -475,7 +475,7 @@ Change Log
 UNRELEASED
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-* flake8-bugbear is now >= 3.9 project like flake8>=7.2.0
+* flake8-bugbear now requires at least Python 3.9, like flake8>=7.2.0
 * B028: Skip if skip_file_prefixes is used (#503)
 
 24.12.12