Update README to remove Release badge #20

Job	Run time
sailr-workflow (ci)	3m 1s
sailr-workflow (ci-build-plan)	2m 57s
sailr-workflow (ci-generate)	2m 45s
sailr-workflow (ci-deploy-plan)	2m 47s
staging-deploy	0s
sailr-ci-build	0s
	11m 30s

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