Use proper zap.Error usage for errors (#9933)
Use proper zap.Error usage for errors (#9933)

* Use proper zap.Error usage for errors

Change-Id: I2c8d7c9e1c7a87c985d952d745676f32626f6dcf

* colon

Change-Id: Ib0942a227f22804d702d0cf05721343f43b2ab1a
knative/serving,knative/serving