Update eventing nightly (#1267)

bumping knative.dev/eventing 5168dc3...16a3986:
  > 16a3986 Don't override default values when applying partial features.yaml configmap  (# 7379)
  > 4d14c21 Added test for multiple sinks, multiple triggers (# 7350)
  > a261e06 OIDC - Support auto generation of PingSource identity service account and expose in AuthStatus (# 7344)
  > 16d75a9 mt-broker-ingress check audience of received token (# 7336)
  > 3ef831c Increase expiration buffer time of OIDCTokenProviders cache to 5 minutes (# 7355)

Signed-off-by: Knative Automation <[email protected]>

Author: knative-automation