fix month

content/static/js/main.js

@@ -190,7 +190,7 @@ const fillCanvas = async () => {
 	const formattedBirthDate = (
 		birthDate.getDate()
 		+ ". "
-		+ birthDate.getMonth() + 1
+		+ (birthDate.getMonth() + 1)
 		+ ". "
 		+ birthDate.getFullYear()
 	);