Fix sending players to quickplay matches

Author: cubicgraphics

BeatTogether.MasterServer.Data/Implementations/Repositories/MemoryServerRepository.cs

@@ -116,7 +116,7 @@ public Task<Server> GetAvailablePublicServer(
                 server.BeatmapDifficultyMask == difficultyMask &&
                 server.GameplayModifiersMask == modifiersMask &&
                 server.SongPackMasks == SongPackMasks &&
-                server.CurrentPlayerCount <= server.GameplayServerConfiguration.MaxPlayerCount
+                server.CurrentPlayerCount < server.GameplayServerConfiguration.MaxPlayerCount
             );
             if (!publicServers.Any())
                 return Task.FromResult<Server>(null);