Add k8s v1.31 to k8s-version-policy

Signed-off-by: michal.gubricky <[email protected]>

Author: michal-gubricky

Tests/kaas/k8s-version-policy/k8s-eol-data.yml

@@ -1,5 +1,7 @@
 # https://kubernetes.io/releases/patch-releases/#detailed-release-history-for-active-branches
 
+- branch: '1.31'
+  end-of-life: '2025-10-28'
 - branch: '1.30'
   end-of-life: '2025-06-28'
 - branch: '1.29'