fix: SocketGuild.HasAllMembers is false if a user left a guild (#1683)

* Fix: HasAllMembers is false if a user left

* Fix: Correct boolean logic

src/Discord.Net.WebSocket/Entities/Guilds/SocketGuild.cs

@@ -136,7 +136,7 @@ namespace Discord.WebSocket
         /// <inheritdoc />
         public string BannerUrl => CDN.GetGuildBannerUrl(Id, BannerId);
         /// <summary> Indicates whether the client has all the members downloaded to the local guild cache. </summary>
-        public bool HasAllMembers => MemberCount == DownloadedMemberCount;// _downloaderPromise.Task.IsCompleted;
+        public bool HasAllMembers => MemberCount <= DownloadedMemberCount;// _downloaderPromise.Task.IsCompleted;
         /// <summary> Indicates whether the guild cache is synced to this guild. </summary>
         public bool IsSynced => _syncPromise.Task.IsCompleted;
         public Task SyncPromise => _syncPromise.Task;