Patch HPA eventing-webhook min replicas (#4811)
Patch HPA eventing-webhook min replicas (#4811)

* Patch HPA min replicas for eventing-webhook

Eventing webhook HPA config sets MinReplicas to 1 and while chaosduck
kills the webhook we get 0 replicas available during E2E tests.

* Fix trailing whitespace
knative/eventing,knative/eventing