fix localstack CLI version detection #171

Job	Run time
build (macos-12, darwin, amd64)	2m 21s
build (macos-12, darwin, amd64)	2m 21s
build (macos-13-xlarge, darwin, arm64)	1m 18s
build (macos-13-xlarge, darwin, arm64)	1m 18s
build (windows-2019, windows, amd64)	6m 1s
build (windows-2019, windows, amd64)	6m 1s
build (ubuntu-20.04, linux, amd64)	3m 27s
build (ubuntu-20.04, linux, amd64)	3m 27s
build (buildjet-2vcpu-ubuntu-2204-arm, linux, arm64)	1s
build (buildjet-2vcpu-ubuntu-2204-arm, linux, arm64)	5m 10s
release	1s
release	0s
	31m 26s

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