Bump kind 1.21 and 1.22, add 1.23 (#2842)

Author: lucacome

.github/workflows/ci.yml

@@ -169,7 +169,7 @@ jobs:
                                                 {\"image\": \"ubi-plus\", \"marker\": \"policies\"}], \
                                               \"k8s\": [\"${{ needs.checks.outputs.k8s_latest }}\"]}"
           else
-            echo "::set-output name=matrix::{\"k8s\": [\"1.19.16\", \"1.20.15\", \"1.21.10\", \"1.22.7\", \"${{ needs.checks.outputs.k8s_latest }}\"], \
+            echo "::set-output name=matrix::{\"k8s\": [\"1.19.16\", \"1.20.15\", \"1.21.12\", \"1.22.9\", \"1.23.6\", \"${{ needs.checks.outputs.k8s_latest }}\"], \
                                              \"images\": [{\"image\": \"debian\"}, {\"image\": \"debian-plus\"}]}"
           fi