Updated CSteamGroup (markdown)

CSteamGroup.md

@@ -122,6 +122,22 @@ Schedules a new event for the group. `type` can be one of the strings shown belo
 - `SportsEvent` - Sporting endeavor
 - `TripEvent` - Out of town excursion
 
+### editEvent(id, name, type, description, time[, server, callback])
+- `id` - The 64-bit numeric ID of the event you want to edit (as a string)
+- `name` - The event's name/headline
+- `type` - See below
+- `description` - A description for the event
+- `time` - `null` to start it immediately, otherwise a `Date` object representing a time in the future
+- `server` - If this is a game event (see below), this can be a string containing the game server's IP address or an object containing `ip` and `password` properties. If not a game event, this should be null or undefined.
+- `callback` - Called when the request completes
+    - `err` - `null` on success, an `Error` object on failure
+
+**Non-object method name: `editGroupEvent`**
+
+**v3.20.0 or later is required to use this method**
+
+Edits an existing Steam group event. Parameters are identical to those in `scheduleEvent`.
+
 ### setPlayerOfTheWeek(steamID[, callback])
 - `steamID` - A `SteamID` object representing the group's new Player of the Week
 - `callback` - Called when the request completes