CI/CD: fix docker-compose not being available in default GH Actions r… #753

Job	Run time
docker-build	35s
build (linux, amd64)	31s
test	6m 18s
build (linux, 386)	38s
lint	1m 17s
build (linux, arm)	27s
build (linux, arm64)	29s
build (darwin, amd64)	34s
build (darwin, arm64)	39s
build (windows, amd64)	36s
build (windows, 386)	38s
build (windows, arm)	33s
build (windows, arm64)	29s
integration-test-serverside (f0023141ec429d912e329665f937d05b178a3fee)	1m 44s
integration-test-clientside (v0.13.2)	1m 51s
analyze	1m 27s
	18m 46s

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