Require Python 3.12 for workflow automation

work_item/core.py

@@ -14,7 +14,7 @@ from typing import Any, Iterable, Sequence
 
 try:
     import tomllib
-except ModuleNotFoundError:  # pragma: no cover - Python < 3.11 is unsupported
+except ModuleNotFoundError:  # pragma: no cover - Python < 3.12 is unsupported
     tomllib = None
 
 
@@ -77,7 +77,7 @@ class Config:
     @classmethod
     def load(cls, path: Path) -> "Config":
         if tomllib is None:
-            raise WorkItemError("Python 3.11 or newer is required")
+            raise WorkItemError("Python 3.12 or newer is required")
         if not path.is_file():
             raise WorkItemError(f"Missing workflow configuration: {path}")
         with path.open("rb") as handle: