[BUG] Wrong birthday card maximum level

[dnaroma]

Describe the bug

The birthday card should have a maximum level of 60, but it is 50 on Sekai Viewer. Also, birthday card is not trainable.

To Reproduce

Check any of the birthday card e.g. https://sekai.best/card/312.

Expected behavior

Screenshots

Browser (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Possible cause and/or solution

Wrong mapping of card maximum level number.