Update DEMO.md

DEMO.md

@@ -11,7 +11,7 @@ There is a `db.demo.sqlite3` file containing demo data. You can use it to test t
   - Email: `demo1@example.com`
   - Password: `DemoUser`
   - Card number: `1111`
-- **User 2*
+- **User 2**
   - Username: `demo2`
   - Email: `demo2@example.com`
   - Password: `DemoUser`