upgrade to latest dependencies (knative#3308)

bumping knative.dev/serving 4a59498...a8803aa:
  > a8803aa Update net-contour nightly (# 16315)
  > 7da1c5c Update net-gateway-api nightly (# 16317)
  > 9adfd47 Update net-istio nightly (# 16314)
  > 10cdf65 Update net-kourier nightly (# 16316)

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

Author: knative-automation

go.mod

@@ -73,7 +73,7 @@ require (
 	knative.dev/eventing v0.47.1-0.20251218024825-2d46bb0c448a
 	knative.dev/hack v0.0.0-20251126013634-1484a9e9b641
 	knative.dev/pkg v0.0.0-20251217214024-80c8bc434670
-	knative.dev/serving v0.47.1-0.20251218030625-4a59498572ee
+	knative.dev/serving v0.47.1-0.20251218232827-a8803aa26a7e
 )
 
 require (

go.sum

@@ -1903,8 +1903,8 @@ knative.dev/networking v0.0.0-20251217020127-11890a5dabea h1:CsVi1M+NbPIfvBPWI9D
 knative.dev/networking v0.0.0-20251217020127-11890a5dabea/go.mod h1:gPzztUiSYDSB3yHx85xr4j2ZccEdiZDWlLsYHr7fQtg=
 knative.dev/pkg v0.0.0-20250716115900-19d3cc2da0b9 h1:P9GFsqTmX4WokSVVUK1IbHOnbJLi8EW1pd4PvbUEodo=
 knative.dev/pkg v0.0.0-20250716115900-19d3cc2da0b9/go.mod h1:Hq2y1gu4P/MWEk9zB8L/zrjJ19ywEnYgwXq8ZMjRl30=
-knative.dev/serving v0.47.1-0.20251218030625-4a59498572ee h1:5BXvqnUh4lW7jNwCFYyxXt1R8VrIbXhRaiD7LqZ2z0g=
-knative.dev/serving v0.47.1-0.20251218030625-4a59498572ee/go.mod h1:qW599XVs3fmHQhD6W+kcy09ojfAXkgTwtJq2EOdouoM=
+knative.dev/serving v0.47.1-0.20251218232827-a8803aa26a7e h1:cDndEOEj+wHCmQwnm4lbDRFpqFWblwccNKM8wzyCcag=
+knative.dev/serving v0.47.1-0.20251218232827-a8803aa26a7e/go.mod h1:qW599XVs3fmHQhD6W+kcy09ojfAXkgTwtJq2EOdouoM=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=