ci: add weekly lockfile update workflow #4084

Job	Run time
checks / pre-commit	31s
checks / readme-snippets	10s
checks / test (3.11, highest, windows-latest)	2m 34s
checks / test (3.10, highest, ubuntu-latest)	44s
checks / test (3.10, lowest-direct, windows-latest)	2m 21s
checks / test (3.11, lowest-direct, windows-latest)	2m 29s
checks / test (3.11, lowest-direct, ubuntu-latest)	46s
checks / test (3.13, lowest-direct, windows-latest)	2m 47s
checks / test (3.14, highest, ubuntu-latest)	1m 11s
checks / test (3.10, highest, windows-latest)	3m 2s
checks / test (3.12, lowest-direct, ubuntu-latest)	52s
checks / test (3.13, lowest-direct, ubuntu-latest)	42s
checks / test (3.12, highest, ubuntu-latest)	50s
checks / test (3.14, highest, windows-latest)	2m 29s
checks / test (3.10, lowest-direct, ubuntu-latest)	44s
checks / test (3.13, highest, ubuntu-latest)	43s
checks / test (3.12, lowest-direct, windows-latest)	3m 9s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 10s
checks / test (3.14, lowest-direct, windows-latest)	2m 20s
checks / test (3.12, highest, windows-latest)	3m 30s
checks / test (3.13, highest, windows-latest)	2m 51s
checks / test (3.11, highest, ubuntu-latest)	46s
	36m 41s

Provide feedback