Update eventing nightly (knative-extensions#3522)

bumping knative.dev/eventing 3fcc78a...1e84b2e:
  > 1e84b2e Cleanup created resources in channel conformance tests between features (# 7500)
  > fa15023 Fix audience description for remaining CRDs (# 7493)
  > 2ee2699 Switch filters to use rfc-3339 for time string encoding (# 7466)
  > 83125a9 InMemoryChannel: reject request for wrong audience (# 7449)
  > aa0d7bb [main] Upgrade to latest dependencies (# 7486)
  > 6f29571 Refactor new filters tests to use single feature set (# 7424)
  > 6abe85b Add triggers OIDC identity to Reply & DLS requests (# 7481)
  > 79bb385 mt-broker-filter: reject request for wrong audience (# 7427)

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