ci: pick the docs-preview toolchain from the PR checkout (#3081) #3433

Job	Run time
checks / pre-commit	1m 59s
checks / readme-snippets	1m 36s
checks / docs	1m 37s
checks / test (3.10, locked, windows-latest)	4m 34s
checks / test (3.10, lowest-direct, ubuntu-latest)	2m 47s
checks / test (3.10, lowest-direct, windows-latest)	5m 34s
checks / test (3.10, locked, ubuntu-latest)	1m 45s
checks / test (3.11, locked, ubuntu-latest)	2m 41s
checks / test (3.11, locked, windows-latest)	2m 56s
checks / test (3.11, lowest-direct, windows-latest)	4m 13s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 52s
checks / test (3.12, lowest-direct, ubuntu-latest)	5m 2s
checks / test (3.12, locked, ubuntu-latest)	2m 29s
checks / test (3.13, locked, windows-latest)	7m 5s
checks / test (3.13, lowest-direct, ubuntu-latest)	3m 49s
checks / test (3.12, lowest-direct, windows-latest)	4m 18s
checks / test (3.14, locked, ubuntu-latest)	4m 37s
checks / test (3.13, lowest-direct, windows-latest)	7m 4s
checks / test (3.12, locked, windows-latest)	4m 33s
checks / test (3.14, lowest-direct, windows-latest)	4m 6s
checks / test (3.14, locked, windows-latest)	3m 42s
checks / test (3.14, lowest-direct, ubuntu-latest)	2m 57s
checks / test (3.13, locked, ubuntu-latest)	1m 54s
all-green	1m 4s
	1h 24m 14s

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