Update eventing nightly

bumping knative.dev/eventing d3feb16...26b9071:
  > 26b9071 make sinkbinding oidc-token volume mount readOnly (# 8894)
  > ba8ac76 Add namespace labels to source metrics (# 8892)
  > 223b43f fix: Add `http.response.status_code` to mt-broker-ingress and imc-dispatcher metrics (# 8891)
  > ec13a36 Remove Kubernetes 1.33 from KinD e2e tests (# 8888)
  > ac3281f fix: Remove duplicate OTEL observability setup in imc-dispatcher (# 8885)

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

Author: knative-automation