Update pre-commit hook asottile/pyupgrade to v3.21.0 (#795) #5777

Job	Run time
Shellcheck	4s
Dependency	4s
Cache identify	18s
Prepare	1m 17s
Ruff check and force	18s
Check commit	34s
Run pytest using Python 3.14	23s
Run pytest using Python 3.13	1m 22s
Run mypy	22s
Process test coverage	23s
Process test complexity	21s
Build and publish Python 🐍 distributions 📦 to TestPyPI	10s
	5m 36s

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