Droid - Update base theme description

Author: Droid00000

docs/resources/message.mdx

@@ -776,7 +776,7 @@ Any entities whose id is included can be mentioned. Do note the API will silentl
 | colors         | array of strings                                        | the hexadecimal-encoded colors of the theme (max of 5) |
 | gradient_angle | integer                                                 | the direction of the theme's colors (max of 360)       |
 | base_mix       | integer                                                 | the intensity of the theme's colors (max of 100)       |
-| base_theme?    | ?[base theme](/docs/resources/message#base-theme-types) | the base theme of the theme                            |
+| base_theme?    | ?[base theme](/docs/resources/message#base-theme-types) | the mode of the theme                                  |
 
 ###### Base Theme Types