Increase pyupgrade to Python 3.9

.pre-commit-config.yaml

@@ -23,7 +23,7 @@ repos:
     rev: v3.3.1
     hooks:
       - id: pyupgrade
-        args: [--py38-plus]
+        args: [--py39-plus]
   - repo: https://github.com/psf/black
     rev: 23.1.0
     hooks: