Add k8s 1.26.0 (Kind) to the test matrix

Signed-off-by: Marco Franssen <[email protected]>

Author: marcofranssen

.github/workflows/helm-chart-ci.yaml

@@ -110,6 +110,7 @@ jobs:
         # Kubernetes, but can go back farther as long as we don't need heroics
         # to pull it off (i.e. kubectl version juggling).
         k8s:
+          - v1.26.0
           - v1.25.3
           - v1.24.7
           - v1.23.13