fix: revert Pipfile python_version to 3

pipenv treats python_version as an exact requirement, not a
minimum, so "3.11" broke deps-install on 3.12+. The minimum
version lives in setup.py (python_requires >= 3.11).

Author: AlexanderWillner

Pipfile

@@ -21,4 +21,4 @@ ruff = "*"
 vulture = "*"
 
 [requires]
-python_version = "3.11"
+python_version = "3"