README: Add colima instructions #979

Job	Run time
build	4m 34s
test-sensor-e2e (ubuntu-latest)	11m 24s
test-full-e2e (ubuntu-latest, compose)	30s
test-full-e2e (ubuntu-latest, distroless)	31s
test-full-e2e (ubuntu-latest, dotnet)	31s
test-full-e2e (ubuntu-latest, elixir)	6s
test-full-e2e (ubuntu-latest, golang)	30s
test-full-e2e (ubuntu-latest, haskell)	29s
test-full-e2e (ubuntu-latest, http-probe)	31s
test-full-e2e (ubuntu-latest, image-edit)	30s
test-full-e2e (ubuntu-latest, java)	30s
test-full-e2e (ubuntu-latest, node)	29s
test-full-e2e (ubuntu-latest, php)	29s
test-full-e2e (ubuntu-latest, python)	29s
test-full-e2e (ubuntu-latest, ruby)	14s
test-full-e2e (ubuntu-latest, rust)	5s
	21m 52s

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