disabled healthz endpoint logging

Signed-off-by: Andrii Chubatiuk <andrew.chubatiuk@motional.com>

ui/default.nginx.conf

@@ -60,6 +60,7 @@ server {
     listen [::]:9090;
     resolver 127.0.0.1 valid=5s;
     location /healthz {
+        access_log /dev/null;
         return 200 'OK';
     }
     location /model/ {