Upgrade pre-commit to Python 3.14 (#716)

Author: adamchainz

.pre-commit-config.yaml

@@ -2,7 +2,7 @@ ci:
   autoupdate_schedule: monthly
 
 default_language_version:
-  python: python3.13
+  python: python3.14
 
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks