[chore] Change renovate datasource for manifest.yaml dependency updates #1449

Job	Run time
docker-build	4m 9s
eec-confmap-provider	27s
k8s-e2e-test-matrix (k8senrichment)	2m 40s
helm-install-test	0s
combined-load-test	0s
k8s-e2e-test-matrix (prometheus)	2m 49s
k8s-e2e-test-matrix (zipkin)	2m 37s
k8s-e2e-test-matrix (statsd)	2m 55s
k8s-e2e-test-matrix (redaction)	2m 17s
notify-slack-combined-load-test	0s
notify-slack-e2e-tests	0s
	17m 54s

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