Use attribute for server

Co-authored-by: Maximilian Kolb <[email protected]>

Author: aneta-petrova

guides/common/modules/con_smart-proxy-networking.adoc

@@ -12,7 +12,7 @@ These clients need direct network access to {ProjectServer}.
 
 External {SmartProxies}::
 External {SmartProxies} are {SmartProxies} not integrated with the {ProjectServer}.
-Hosts that are clients of external {SmartProxies} do not need direct access to the Foreman server itself.
+Hosts that are clients of external {SmartProxies} do not need direct access to the {ProjectServer} itself.
 
 Many of the services that {SmartProxyServer} manages use dedicated network ports.
 However, {SmartProxyServer} ensures that all communications from the host to {ProjectServer} use a single source IP address, which simplifies firewall administration.