Update kind

Update kind from v0.11.1 to v0.20.0 to take advantage of latest apis

Author: therealmitchconnors

.github/workflows/e2e.yaml

@@ -20,7 +20,7 @@ jobs:
       - name: Setup Kubernetes
         uses: engineerd/setup-kind@v0.5.0
         with:
-          version: v0.11.1
+          version: v0.20.0
       - name: Install Flux in Kubernetes Kind
         run: flux install
       - name: Set Istio Gateway service type