Fix guild ID row name in query

PluralKit.Bot/Services/LogChannelService.cs

@@ -59,7 +59,7 @@ namespace PluralKit.Bot {
                 // Channel doesn't exist or we don't have permission to access it, let's remove it from the database too
                 _logger.Warning("Attempted to fetch missing log channel {LogChannel}, removing from database", channel);
                 await using var conn = await _db.Obtain();
-                await conn.ExecuteAsync("update servers set log_channel = null where server = @Guild",
+                await conn.ExecuteAsync("update servers set log_channel = null where id = @Guild",
                     new {Guild = guild});
             }