Fix 2 typos

doc/classes/VisualScriptEngineSingleton.xml

@@ -25,7 +25,7 @@
 		</method>
 	</methods>
 	<members>
-		<member name="/constant" type="String" setter="set_singleton" getter="get_singleton">
+		<member name="constant" type="String" setter="set_singleton" getter="get_singleton">
 		</member>
 	</members>
 	<constants>

modules/visual_script/visual_script_nodes.cpp

@@ -2002,7 +2002,7 @@ void VisualScriptEngineSingleton::_bind_methods() {
 		cc += E->get().name;
 	}
 
-	ADD_PROPERTY(PropertyInfo(Variant::STRING, "/constant", PROPERTY_HINT_ENUM, cc), "set_singleton", "get_singleton");
+	ADD_PROPERTY(PropertyInfo(Variant::STRING, "constant", PROPERTY_HINT_ENUM, cc), "set_singleton", "get_singleton");
 }
 
 VisualScriptEngineSingleton::VisualScriptEngineSingleton() {