Fix a typo in the haproxy conditional.

templates/portainer-agent-stack.yml.j2

@@ -40,7 +40,7 @@ services:
   portainer:
     image: portainer/portainer-ce
     command: -H tcp://tasks.agent:9001 --tlsskipverify
-{% if docker_swarm_cluster_haproxy_install %}
+{% if not docker_swarm_cluster_haproxy_install %}
 
     ports:
       - target: 9443
@@ -60,7 +60,7 @@ services:
       - portainer_server_data:/data
     networks:
       - {{ docker_swarm_portainer_network }}
-{% if docker_swarm_cluster_haproxy_install %}
+{% if not docker_swarm_cluster_haproxy_install %}
 
       - {{ haproxy_docker_overlay_network }}
 {% endif %}