update docs (#3407)

Author: TrentinTheKid

docs/adding-servers/metadata.mdx

@@ -34,6 +34,8 @@ The `primaryAddress` in each server object is for users to connect to your serve
 
 Game types help identify the style of games that your server will offer to player. The following are games you may include: `PvP`, `PvE`, `HCF`, `Factions`, `Minigames`, `Skyblock`, `Parkour`, `UHC`, `Hardcore`, `Survival`, `Open World`, `Prison`, `Creative`, `Roleplay`, and `Adventure`.
 
+You can select up to `3` game types, choose the game types that represent your server the best.
+
 ### Colors
 
 Each server must have a `primaryColor` and `secondaryColor`. These colors should represent the brand of your server. These colors must be in hexadecimal format, and must be prefixed with a `#`.