Merge pull request #2501 from python-trio/dependabot/pip/black-22.12.0

Bump black from 22.10.0 to 22.12.0

Author: harahu

test-requirements.txt

@@ -17,7 +17,7 @@ attrs==22.1.0
     #   pytest
 backcall==0.2.0
     # via ipython
-black==22.10.0 ; implementation_name == "cpython"
+black==22.12.0 ; implementation_name == "cpython"
     # via -r test-requirements.in
 cffi==1.15.1
     # via cryptography