Merge pull request #8461 from Gacko/upyvq

Ingress NGINX: Promote Chart v4.12.6.

Author: k8s-ci-robot

registry.k8s.io/images/k8s-staging-ingress-nginx/images.yaml

@@ -390,6 +390,7 @@
 - name: charts/ingress-nginx
   dmap:
     "sha256:e5927c7d7a113f288c1ed5e45ee48b7d208ee5d125c9a830e86e35e92f5fb032": ["v4.12.5"]
+    "sha256:d12e65eb4a01ad598469ec10a9309f38a1f4dbbde98af0006015f92f82183d28": ["v4.12.6"]
     "sha256:1d936cee5b433a84f69065b90ec15abfb01eb78645af9926754c1fb2fa3d8c92": ["v4.13.1"]
     "sha256:1f5d40f230e5ef7091521b2113c122a6831268b122249b781ea54f72c8bff2a1": ["v4.13.2"]