upgrade to latest dependencies

bumping knative.dev/networking 50368a7...6feaf0c:
  > 6feaf0c Changed the go version to 1.21 (# 860)
bumping knative.dev/eventing 5acf974...e407152:
  > e407152 Adding description for the built-in event types of our duck sources (# 7263)
  > 401068c [main] Upgrade to latest dependencies (# 7262)
bumping knative.dev/serving 7222bf9...022f553:
  > 022f553 Update net-certmanager nightly (# 14362)
  > 50eb65a upgrade to latest dependencies (# 14395)

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