Updated readme. Backend version 12 (#36) #52

Job	Run time
Begin trail	7s
Pull-request	9s
Build backend	5s
Deploy to development / deploy	2s
Deploy to stage / deploy	2s
get-approver-for-stage	4s
Check for semver tag	4s
Create GitHub Release	3s
Assert artifacts	5s
Deploy to production / deploy	2s
get-approver-for-production	6s
	49s

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