Update Kubernetes versions in e2e workflow (#392)

Author: davidhadas

.github/workflows/e2e.yaml

@@ -15,8 +15,8 @@ jobs:
       fail-fast: false # Keep running if one leg fails.
       matrix:
         k8s-version:
-        - v1.33.x
-        - v1.32.x
+        - v1.35.x
+        - v1.34.x
 
     env:
       KO_DOCKER_REPO: registry.local:5000/knative # registry setup by setup-kind