Update net-contour nightly (#14049)

bumping knative.dev/net-contour 6a38dd7...9f7ee75:
  > 9f7ee75 refactor: use new dataplane-trust flag (# 912)
  > f336617 upgrade to latest dependencies (# 919)

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

third_party/contour-latest/net-contour.yaml

@@ -8,7 +8,7 @@ metadata:
     networking.knative.dev/ingress-provider: contour
     app.kubernetes.io/component: net-contour
     app.kubernetes.io/name: knative-serving
-    app.kubernetes.io/version: "20230530-6a38dd78"
+    app.kubernetes.io/version: "20230601-9f7ee758"
     serving.knative.dev/controller: "true"
 rules:
   - apiGroups: ["projectcontour.io"]
@@ -38,7 +38,7 @@ metadata:
     networking.knative.dev/ingress-provider: contour
     app.kubernetes.io/component: net-contour
     app.kubernetes.io/name: knative-serving
-    app.kubernetes.io/version: "20230530-6a38dd78"
+    app.kubernetes.io/version: "20230601-9f7ee758"
 data:
   _example: |
     ################################
@@ -95,7 +95,7 @@ metadata:
     networking.knative.dev/ingress-provider: contour
     app.kubernetes.io/component: net-contour
     app.kubernetes.io/name: knative-serving
-    app.kubernetes.io/version: "20230530-6a38dd78"
+    app.kubernetes.io/version: "20230601-9f7ee758"
 spec:
   replicas: 1
   selector:
@@ -107,14 +107,14 @@ spec:
         app: net-contour-controller
         app.kubernetes.io/component: net-contour
         app.kubernetes.io/name: knative-serving
-        app.kubernetes.io/version: "20230530-6a38dd78"
+        app.kubernetes.io/version: "20230601-9f7ee758"
     spec:
       serviceAccountName: controller
       containers:
         - name: controller
           # This is the Go import path for the binary that is containerized
           # and substituted here.
-          image: gcr.io/knative-nightly/knative.dev/net-contour/cmd/controller@sha256:80a4d0cb1e1e86d0f67a8669b573c6b6bc5627306e06e844d94806633d5ef38f
+          image: gcr.io/knative-nightly/knative.dev/net-contour/cmd/controller@sha256:f8d87d95f9a90bc3c063c0eac9484fe6f83410161c5bd5896a21bd7a869bb967
           resources:
             requests:
               cpu: 40m
@@ -156,7 +156,7 @@ metadata:
     networking.knative.dev/ingress-provider: contour
     app.kubernetes.io/component: net-contour
     app.kubernetes.io/name: knative-serving
-    app.kubernetes.io/version: "20230530-6a38dd78"
+    app.kubernetes.io/version: "20230601-9f7ee758"
 spec:
   delegations:
     - secretName: knative-serving-certs