Bump Swatinem/rust-cache from 2.7.0 to 2.7.1 #273

Job	Run time
miri	1m 18s
build (ubuntu, stable, locked, true)	13m 16s
build (windows, stable, locked, false)	22m 52s
build (macos, stable, locked, false)	46m 55s
no_std	31s
build (ubuntu, nightly, locked, false)	18m 54s
build (ubuntu, beta, locked, false)	11m 53s
build (ubuntu, stable, latest, false)	13m 0s
build (ubuntu, stable, minimal, false)	13m 4s
fuzz	13m 54s
features	24m 32s
deploy	0s
	3h 0m 9s

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