Fix VSCode autoformat config to avoid bad Python version for pyink.

Black and Pyink do not support python 3.12.5, but uvx automatically
selects this version occasionally, which breaks autoformatting in
VSCode.

See https://github.com/psf/black/blob/24.10.0/CHANGES.md for details.

.vscode/settings.json

@@ -24,6 +24,6 @@
         "editor.detectIndentation": false,
         "editor.defaultFormatter": "ms-python.black-formatter",
     },
-    "black-formatter.path": ["uvx", "pyink"],
+    "black-formatter.path": ["uvx", "--python=>=3.9,!=3.12.5", "pyink"],
     "pylint.enabled": true,
 }