cicd: pin black formatter to previous version

jsstevenson · jsstevenson · commit 5eab0c373854 · 2026-01-20T12:19:24.000-05:00
diff --git a/tox.ini b/tox.ini
@@ -26,6 +26,7 @@ skip_install = true
 deps =
     flake8<5.0.0
     flake8-docstrings
+    black==25.12.0
     flake8-black
     flake8-isort
 commands =
