fix(manifest): main key no longer required for themes

docs/manifest.mdx

@@ -49,7 +49,7 @@ All keys in the [common section](#common), as well as the following:
 | Key                    | Type              | Description                                                                                                                                                                                                                                 |
 | ---------------------- | ----------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | type&nbsp;<Required /> | 'replugged-theme' | Must be `replugged-theme`.                                                                                                                                                                                                                  |
-| main&nbsp;<Required /> | string            | The path to the main entrypoint of your theme (CSS). The [theme template](https://github.com/replugged-org/theme-template) will allow you to also use SCSS and will handle compiling and updating the file location for you.                |
+| main                   | string            | The path to the main entrypoint of your theme (CSS). The [theme template](https://github.com/replugged-org/theme-template) will allow you to also use SCSS and will handle compiling and updating the file location for you.                |
 | splash                 | string            | The path to Discord's splash screen entrypoint of your theme (CSS). The [theme template](https://github.com/replugged-org/theme-template) will allow you to also use SCSS and will handle compiling and updating the file location for you. |
 
 ## Types