v-m: Switch to quay.io for container images

Docker Hub has blocked ("rate limited") my IP address.  Moving as much
as I can to use images from other sources.  Hopefully they'll unblock me
soon and I can deploy a caching proxy.

victoria-metrics/vmselect.yaml

@@ -34,7 +34,7 @@ spec:
     spec:
       containers:
       - name: vmselect
-        image: docker.io/victoriametrics/vmselect:v1.96.0-cluster
+        image: quay.io/victoriametrics/vmselect:v1.96.0-cluster
         args:
         - -envflag.enable=true
         - -envflag.prefix=vmselect_