Add label to build #12

Job	Run time
gatekeeper	5s
load-config	6s
build-vllm-rayserve-image	14s
set-rayserve-test-environment	7s
vllm-rayserve-example-test	14m 58s
vllm-rayserve-cuda-test	1m 33s
vllm-rayserve-regression-test	5m 56s
generate-rayserve-release-spec	6s
release-rayserve-image / validate-release	7s
release-rayserve-image / step1-publish-images	19m 8s
release-rayserve-image / step2-generate-info	29s
release-rayserve-image / step3-publish-notifications	14s
	43m 3s

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