Revert "Upgrade knative to version 1.13"

This reverts commit d41b7e8.

Author: Utwo

infra/knative/crd.yaml

@@ -14,7 +14,7 @@ metadata:
   name: knative-serving
   namespace: knative-serving
 spec:
-  version: "1.13"
+  version: "1.12"
   ingress:
     kourier:
       enabled: true

infra/knative/kustomization.yaml

@@ -2,8 +2,8 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
-  - https://github.com/knative/operator/releases/download/knative-v1.13.0/operator.yaml
-  - https://github.com/knative/net-certmanager/releases/download/knative-v1.13.0/release.yaml
+  - https://github.com/knative/operator/releases/download/knative-v1.12.0/operator.yaml
+  - https://github.com/knative/net-certmanager/releases/download/knative-v1.12.0/release.yaml
   - crd.yaml
 
 patches: