ci: add weekly lockfile update workflow #4087

Job	Run time
checks / readme-snippets	14s
checks / pre-commit	30s
checks / test (3.11, highest, ubuntu-latest)	43s
checks / test (3.12, lowest-direct, windows-latest)	3m 13s
checks / test (3.10, highest, ubuntu-latest)	49s
checks / test (3.13, highest, windows-latest)	2m 21s
checks / test (3.14, highest, windows-latest)	2m 15s
checks / test (3.12, highest, ubuntu-latest)	51s
checks / test (3.10, lowest-direct, ubuntu-latest)	46s
checks / test (3.13, lowest-direct, ubuntu-latest)	46s
checks / test (3.13, lowest-direct, windows-latest)	2m 28s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 10s
checks / test (3.10, highest, windows-latest)	2m 25s
checks / test (3.11, lowest-direct, ubuntu-latest)	45s
checks / test (3.14, lowest-direct, windows-latest)	2m 37s
checks / test (3.14, highest, ubuntu-latest)	1m 11s
checks / test (3.10, lowest-direct, windows-latest)	2m 15s
checks / test (3.13, highest, ubuntu-latest)	41s
checks / test (3.12, highest, windows-latest)	3m 37s
checks / test (3.11, lowest-direct, windows-latest)	2m 33s
checks / test (3.12, lowest-direct, ubuntu-latest)	56s
checks / test (3.11, highest, windows-latest)	2m 36s
	35m 42s

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