Update e2e tests to Kubernetes v1.20.2

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

.github/workflows/e2e.yaml

@@ -27,8 +27,8 @@ jobs:
         uses: engineerd/setup-kind@v0.5.0
         with:
           version: "v0.10.0"
-          image: kindest/node:v1.16.15@sha256:c10a63a5bda231c0a379bf91aebf8ad3c79146daca59db816fb963f731852a99
-          config: .github/workflows/e2e_kind_config.yaml # disable KIND-net
+          image: kindest/node:v1.20.2@sha256:8f7ea6e7642c0da54f04a7ee10431549c0257315b3a634f6ef2fecaaedb19bab
+          config: .github/kind/config.yaml # disable KIND-net
       - name: Setup Calico for network policy
         run: |
           kubectl apply -f https://docs.projectcalico.org/v3.16/manifests/calico.yaml