Update CODEOWNERS (#4084)
Update CODEOWNERS (#4084)

* add @nachtmaar to codeowners

* remove @sayanh from serverless/monitoring in CODEOWNERS

* update codeowners for monitoring / logging

* update codeowners for knative-serving

kyma-project/kyma,kyma-project/kyma,kyma-project/kyma,kyma-project/kyma