Document GUILD_TAGS guild feature (#7710)

Author: Sacul0457

docs/resources/guild.mdx

@@ -160,6 +160,7 @@ Fields specific to the `GUILD_CREATE` event are listed in the [Gateway Events do
 | VIP_REGIONS                               | guild has access to set 384kbps bitrate in voice (previously VIP voice servers)                                               |
 | WELCOME_SCREEN_ENABLED                    | guild has enabled the welcome screen                                                                                          |
 | GUESTS_ENABLED                            | guild has access to guest invites                                                                                             |
+| GUILD_TAGS                                | guild has access to set guild tags                                                                                            |
 | ENHANCED_ROLE_COLORS                      | guild is able to set gradient colors to roles                                                                                 |
 
 ###### Mutable Guild Features