[Automated] Update backstage-plugins-eventing nightly (#161)

Update eventing nightly

bumping knative.dev/eventing 4a6e7d2...162575c:
  > 162575c Not just render oidc env-vars when cfg is on, we need also a present audience to ensure the camel containers work correct (# 8448)

Signed-off-by: Knative Automation <automation@knative.team>

Author: knative-automation