raddb: Remove extra apostrophe from trigger.conf

Remove a spurious apostrophe from trigger.conf's trigger.modules.args.

This fixes module triggers, otherwise producing this error:

    rad_expand_xlat: Invalid string passed as argument

raddb/trigger.conf

@@ -194,7 +194,7 @@ trigger {
 	#  "trigger" subsection in the module configuration.
 	modules {
 		# Common arguments
-		args = "radiusdModuleName s ldap' radiusdModuleInstance s ''"
+		args = "radiusdModuleName s ldap radiusdModuleInstance s ''"
 
 		# The files module
 		files {