add clarification that GUILD_BAN_ADD and GUILD_BAN_REMOVE will only get sent to bots with the BAN_MEMBERS permission

Author: maukkis

docs/events/gateway-events.mdx

@@ -684,7 +684,7 @@ Sent when a guild audit log entry is created. The inner payload is an [Audit Log
 
 #### Guild Ban Add
 
-Sent when a user is banned from a guild.
+Sent when a user is banned from a guild. This event is only sent to bots with the `BAN_MEMBERS` permission.
 
 ###### Guild Ban Add Event Fields
 
@@ -695,7 +695,7 @@ Sent when a user is banned from a guild.
 
 #### Guild Ban Remove
 
-Sent when a user is unbanned from a guild.
+Sent when a user is unbanned from a guild. This event is only sent to bots with the `BAN_MEMBERS` permission.
 
 ###### Guild Ban Remove Event Fields