chore(deps): update taiki-e/install-action digest to 6a4015d (#425) #1655

Job	Run time
Build and test core crates (ubuntu-latest, 1.78)	1m 33s
Build and test (all features) (ubuntu-latest, 1.78)	2m 46s
Cross-compile to aarch64	1m 24s
Build and test core crates (ubuntu-latest, stable)	1m 33s
Build and test (all features) (ubuntu-latest, stable)	2m 26s
Build and test core crates (macos-14, 1.78)	1m 41s
Build documentation (ubuntu-latest)	1m 5s
Build and test (all features) (macos-14, 1.78)	3m 51s
Build and test core crates (macos-14, stable)	1m 29s
Lint	1m 9s
Build and test (all features) (macos-14, stable)	2m 19s
Build and test core crates (windows-latest, 1.78)	5m 16s
cargo-compare extended tests (ubuntu-latest)	49s
Build and test (all features) (windows-latest, 1.78)	7m 12s
Build and test core crates (windows-latest, stable)	4m 13s
cargo-compare extended tests (macos-14)	58s
Build and test (all features) (windows-latest, stable)	5m 51s
	45m 35s

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