fix(q3): Fix q3-only typo in install_config.sh (#4709)

lgsm/modules/install_config.sh

@@ -614,7 +614,7 @@ elif [ "${shortname}" == "q2" ]; then
 	fn_list_config_locations
 elif [ "${shortname}" == "q3" ]; then
 	array_configs+=(server.cfg)
-	fn_fetch_default_configs
+	fn_fetch_default_config
 	fn_default_config_remote
 	fn_set_config_vars
 	fn_list_config_locations