build

Add `distroless` to README.md (#84) #159

Job	Run time
no_std (ubuntu-latest, stable)	13s
no_std-win (stable)	33s
no_std-win (nightly)	35s
no_std (macos-latest, nightly)	22s
no_std (macos-latest, stable)	12s
no_std (ubuntu-latest, nightly)	14s
no_main-win (nightly)	44s
Default (ubuntu-latest, stable)	20s
build-std (build_std)	47s
no_main-win (stable)	33s
build-std (no_main/nix)	50s
Default (ubuntu-latest, nightly)	15s
Default (windows-latest, stable)	1m 40s
Default (macos-latest, nightly)	22s
Default (macos-latest, stable)	12s
Default (windows-latest, nightly)	1m 11s
	9m 3s

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