Bump astral-sh/setup-uv from 5 to 6 #1296

Job	Run time
list	5s
ci (macos-latest, tests-3.11)	15s
ci (macos-latest, tests-3.13)	14s
ci (macos-latest, style)	11s
ci (macos-latest, docs(dirhtml))	21s
ci (macos-latest, build)	12s
ci (ubuntu-latest, tests-3.13)	9s
ci (macos-latest, docs(doctest))	28s
ci (macos-latest, docs(spelling))	19s
ci (macos-latest, docs(man))	23s
ci (macos-latest, typing)	15s
ci (macos-latest, audit)	15s
ci (macos-latest, docs(style))	20s
ci (ubuntu-latest, docs(doctest))	32s
ci (ubuntu-latest, tests-3.12)	8s
ci (ubuntu-latest, audit)	13s
ci (ubuntu-latest, docs(dirhtml))	29s
ci (macos-latest, docs(linkcheck))	23s
ci (ubuntu-latest, typing)	11s
ci (ubuntu-latest, style)	7s
ci (ubuntu-latest, build)	10s
ci (ubuntu-latest, tests-3.11)	12s
ci (ubuntu-latest, docs(linkcheck))	32s
ci (ubuntu-latest, docs(man))	29s
ci (ubuntu-latest, docs(spelling))	27s
ci (ubuntu-latest, docs(style))	29s
ci (macos-latest, tests-3.12)	11s
packaging	12s
	8m 12s

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