[chore] [exporter/signalfx] enable cpu attr in per-core changelog example #14

Job	Run time
datadog-examples-test	8m 10s
collector-build	14m 30s
docker-build	12m 28s
kubernetes-test-matrix (v1.34.0, receiver/k8sclusterreceiver)	13m 3s
kubernetes-test-matrix (v1.35.0, receiver/kubeletstatsreceiver)	5m 24s
kubernetes-test-matrix (v1.35.0, receiver/k8seventsreceiver)	4m 54s
kubernetes-test-matrix (v1.34.0, processor/k8sattributesprocessor)	13m 47s
kubernetes-test-matrix (v1.34.0, extension/observer/k8sobserver)	4m 24s
kubernetes-test-matrix (v1.34.0, receiver/kubeletstatsreceiver)	5m 5s
kubernetes-test-matrix (v1.34.0, receiver/k8sobjectsreceiver)	4m 18s
kubernetes-test-matrix (v1.35.0, processor/resourcedetectionprocessor)	12m 54s
kubernetes-test-matrix (v1.34.0, processor/resourcedetectionprocessor)	11m 5s
kubernetes-test-matrix (v1.34.0, receiver/k8seventsreceiver)	5m 29s
kubernetes-test-matrix (v1.35.0, receiver/k8sobjectsreceiver)	4m 55s
kubernetes-test-matrix (v1.35.0, receiver/k8sclusterreceiver)	13m 18s
kubernetes-test-matrix (v1.35.0, processor/k8sattributesprocessor)	13m 55s
kubernetes-test-matrix (v1.35.0, extension/observer/k8sobserver)	4m 12s
supervisor-test	9m 23s
kubernetes-test	3s
	2h 41m 17s

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