fix type cast in mcvcli stop #36

Job	Run time
Dist (x86_64-windows)	5m 7s
Dist (x86_64-linux)	1m 0s
Dist (aarch64-macos, macos-latest, stable, aarch64-apple-darwin)	1m 22s
Dist (x86_64-macos)	1m 20s
Dist (aarch64-linux, ubuntu-22.04, stable, aarch64-unknown-linux-gnu, true)	1m 22s
Publish	26s
	10m 37s

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