Update llm.yaml (#702)

Minor nit on the hostpath URL

Author: mkhaas

config/samples/nim/serving/standalone/routers/ingress/llm.yaml

@@ -52,4 +52,4 @@ spec:
   router:
     ingress:
       ingressClass: nginx
-    hostDomainName: demo.nvidia.example.com
+    hostDomainName: demo.example.nvidia.com