Bump astral-sh/setup-uv from 6.4.1 to 6.4.3 in the actions group (#638) #2222

Job	Run time
Run tests (3.9.12)	15s
Run tests (3.9)	7s
Run tests (3.11)	9s
Run tests (3.10.4)	15s
Run tests (3.10)	7s
Run tests (3.11.0)	17s
Run tests (pypy3.9)	10s
Run tests (3.12.0)	17s
Run tests (3.13.0)	13s
Run tests (3.12)	7s
Run tests (3.14)	15s
Run tests (pypy3.10)	12s
Run tests (pypy3.11)	19s
Run tests (3.13)	7s
Create an issue if daily tests failed	0s
	2m 50s

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