install: ignore umask #13251

Job	Run time
Style/lint (macos-latest, feat_os_macos)	1m 13s
Style/lint (windows-latest, feat_os_windows)	2m 3s
Style/lint (ubuntu-latest, all, true)	1m 11s
Style/format (ubuntu-latest, feat_os_unix)	18s
Style/toml	14s
Pre-commit hooks	33s
Style/Python	7s
Style/spelling (ubuntu-latest, feat_os_unix)	1m 34s
	7m 13s

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