fix(ci): wrong nginx-proxy image used on default_host test

test/test_default-host.yml

@@ -10,7 +10,7 @@ web1:
 
 # WHEN nginx-proxy runs with DEFAULT_HOST set to web1.tld
 sut:
-  image: jwilder/nginx-proxy:test
+  image: nginxproxy/nginx-proxy:test
   volumes:
     - /var/run/docker.sock:/tmp/docker.sock:ro
     - ./lib/ssl/dhparam.pem:/etc/nginx/dhparam/dhparam.pem:ro