[Automated] Update backstage-plugins-eventing nightly (openshift-knative#145)

Update eventing nightly

bumping knative.dev/eventing 134c4c0...eaaab21:
  > eaaab21 Adding reconciler test for OIDC of the Integration Source (# 8404)
  > 350f81b [main] Update community files (# 8403)

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

Author: knative-automation