build: update Kubernetes versions in e2e workflows

Signed-off-by: Hidde Beydals <hidde@hhh.computer>

.github/workflows/e2e-arm64.yaml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         # Keep this list up-to-date with https://endoflife.date/kubernetes
-        KUBERNETES_VERSION: [ 1.23.13, 1.24.7, 1.25.3 ]
+        KUBERNETES_VERSION: [ 1.24.11, 1.25.7, 1.26.2 ]
     steps:
       - name: Checkout
         uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3.3.0

.github/workflows/e2e-bootstrap.yaml

@@ -33,7 +33,10 @@ jobs:
         with:
           version: v0.17.0
           cluster_name: kind
-          node_image: kindest/node:v1.25.2
+          # The versions below should target the newest Kubernetes version
+          # Keep this up-to-date with https://endoflife.date/kubernetes
+          node_image: kindest/node:v1.26.0
+          kubectl_version: v1.26.2
       - name: Setup Kustomize
         uses: fluxcd/pkg/actions/kustomize@main
       - name: Build

.github/workflows/e2e.yaml

@@ -38,10 +38,13 @@ jobs:
           version: v0.17.0
           cluster_name: kind
           config: .github/kind/config.yaml # disable KIND-net
-          node_image: kindest/node:v1.23.13
+          # The versions below should target the newest Kubernetes version
+          # Keep this up-to-date with https://endoflife.date/kubernetes
+          node_image: kindest/node:v1.26.0
+          kubectl_version: v1.26.2
       - name: Setup Calico for network policy
         run: |
-          kubectl apply -f https://docs.projectcalico.org/v3.20/manifests/calico.yaml
+          kubectl apply -f https://docs.projectcalico.org/v3.25/manifests/calico.yaml
           kubectl -n kube-system set env daemonset/calico-node FELIX_IGNORELOOSERPF=true
       - name: Setup Kustomize
         uses: fluxcd/pkg/actions/kustomize@main