Age Limit: Please update OARS ratings

@Cookiiieee FYI.

Please update the OARS ratings to reflect the app's capabilities.

At the moment, it says

> **Nudity**: Brief artistic nudity • Provocative references or depictions

Using the following OARS ratings would fix the `nudity` issue. There are other topics you should also check: Violence, Drugs, etc.

See: https://hughsie.github.io/oars/generate.html

```

intense
moderate

```

Since this app allows NSFW content, the `sex-nudity` rating should be set to `intense`. For the `sex-themes` rating, using the `moderate` rating would be accurate.

**For reference**

> **sex-nudity**
> - Mild: Brief artistic nudity
> - Moderate: Prolonged nudity
> - Intense: Explicit nudity showing nipples or sexual organs
>
> **sex-themes**
> - Mild: Provocative references or depictions
> - Moderate: Sexual references or depictions
> - Intense: Graphic sexual behavior