Ignore coverage combine errors #567

Job	Run time
base_setup_pre	42s
base_setup_minimum	52s
binder_link	32s
base_setup (ubuntu-latest, 3.8)	34s
base_setup (ubuntu-latest, 3.11)	28s
check_links	3m 16s
downstream_defaults	58s
base_setup (windows-latest, 3.8)	1m 30s
downstream_overrides	2m 15s
base_setup (windows-latest, 3.11)	2m 19s
Test Lint	1m 0s
base_setup (macos-latest, 3.8)	48s
base_setup (macos-latest, 3.11)	43s
base_setup (ubuntu-latest, 3.12)	38s
Test coverage (ubuntu-latest)	24s
Test coverage (windows-latest)	1m 52s
install_minimums (3.8)	46s
Make SDist	2m 33s
pr_script	29s
update_snapshots	1m 0s
update_snapshots-manual-server	58s
Combine & check coverage	7s
Install from SDist and Test	50s
tests_check	2s
	25m 36s

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