Bump kind versions in nightly (#4056)

Bumps versions of kind in the nightly matrix.

Author: lucacome

.github/workflows/ci.yml

@@ -253,7 +253,7 @@ jobs:
                                                 {\"image\": \"debian-plus-nap\", \"marker\": \"appprotect\"}], \
                                               \"k8s\": [\"${{ needs.checks.outputs.k8s_latest }}\"]}" >> $GITHUB_OUTPUT
           else
-            echo "matrix={\"k8s\": [\"1.22.17\", \"1.23.17\", \"1.24.12\", \"1.25.8\", \"1.26.3\", \"${{ needs.checks.outputs.k8s_latest }}\"], \
+            echo "matrix={\"k8s\": [\"1.22.17\", \"1.23.17\", \"1.24.15\", \"1.25.11\", \"1.26.6\", \"${{ needs.checks.outputs.k8s_latest }}\"], \
                                              \"images\": [{\"image\": \"debian\"}, {\"image\": \"debian-plus\"}]}" >> $GITHUB_OUTPUT
           fi