ci: update unsupported ci-aks k8s version from 1.26 to 1.27

ci-aks started to fail because the only configured k8s version 1.26
is no longer available on Azure AKS.

https://learn.microsoft.com/en-us/azure/aks/supported-kubernetes-versions?tabs=azure-cli

Therefore, this commit updates the k8s version to 1.27.

Suggested-by: Marcel Zieba <marcel.zieba@isovalent.com>
Signed-off-by: Marco Hofstetter <marco.hofstetter@isovalent.com>

.github/actions/azure/k8s-versions.yaml

@@ -1,7 +1,7 @@
 # List of k8s version for AKS tests
 ---
 include:
-  - version: "1.26"
+  - version: "1.27"
     location: westus2
     index: 1
     default: true