Update net-contour nightly (#12706)

bumping knative.dev/net-contour 0db937b...f766987:
  > f766987 Rename certgen job in nightly build CI (# 733)

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: "20220307-0db937b5"
+    app.kubernetes.io/version: "20220308-f7669872"
     serving.knative.dev/controller: "true"
 rules:
   - apiGroups: ["projectcontour.io"]
@@ -38,8 +38,8 @@ metadata:
     networking.knative.dev/ingress-provider: contour
     app.kubernetes.io/component: net-contour
     app.kubernetes.io/name: knative-serving
-    app.kubernetes.io/version: "20220307-0db937b5"
-    serving.knative.dev/release: "v20220307-0db937b5"
+    app.kubernetes.io/version: "20220308-f7669872"
+    serving.knative.dev/release: "v20220308-f7669872"
 data:
   _example: |
     ################################
@@ -105,14 +105,14 @@ spec:
         app: net-contour-controller
         app.kubernetes.io/component: net-contour
         app.kubernetes.io/name: knative-serving
-        app.kubernetes.io/version: "20220307-0db937b5"
+        app.kubernetes.io/version: "20220308-f7669872"
     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@sha256:71d3b7d88f99f6b9d3cc77316023ed14dc16599a65cbb73b7dcccb2211fa32c4
+          image: gcr.io/knative-nightly/knative.dev/net-contour/cmd/controller@sha256:5be008822f206f7486f6f3072825f5507674e9a188c6f7f3808bd5dff2b0094a
           resources:
             requests:
               cpu: 40m