Update sample.props.template

api/portal documentation was misleading

obp-api/src/main/resources/props/sample.props.template

@@ -885,9 +885,10 @@ database_messages_scheduler_interval=3600
 
 # -- OBP-API mode -------------------------------
 # In case isn't defined default value is "apis,portal"
-# Possible cases: portal, api
+# Possible cases: portal, apis
 # server_mode=apis,portal
-# If the server_mode set to `portal`, so we need to set its portal hostname. If omit this props, then it will use `hostname` value instead.
+# In case there is a separate portal instance, the API side must also have the following key with the correct portal URL as value.
+# Else, it will just use "hostname":
 # portal_hostname=http://127.0.0.1:8080
 # -----------------------------------------------
 
@@ -1243,4 +1244,4 @@ show_ip_address_change_warning=false
 
 
 #the default expected Open Futures Per Service for the BackOffFactor parameter
-expectedOpenFuturesPerService=100
+expectedOpenFuturesPerService=100