chore(deps): update taiki-e/install-action digest to 6aa8b42 #3499

Job	Run time
Static analysis	1m 28s
Build (x86_64-unknown-linux-gnu)	6m 27s
Build (x86_64-unknown-linux-musl)	6m 32s
Build (x86_64-pc-windows-gnu)	8m 44s
Build (aarch64-unknown-linux-gnu)	6m 23s
Build (aarch64-unknown-linux-musl)	6m 38s
Build (x86_64-apple-darwin)	23m 22s
Build (aarch64-apple-darwin)	5m 37s
Build Docker images	14s
Build universal macOS binaries	13s
Run and upload benchmarks	0s
	1h 5m 38s

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