add TODO about setting ySpeed = 0 in head-bonk

GitOrigin-RevId: 657d92ebbd

Shared/Player.cs

@@ -60,6 +60,7 @@ namespace SemiColinGames {
           if (oldPosition.Y > position.Y) {
             int diff = playerBbox.Top - rect.Bottom;
             position.Y -= diff;
+            // TODO: set ySpeed = 0 here so that bonking our head actually reduces hangtime?
           } else {
             standingOnGround = true;
             int diff = playerBbox.Bottom - rect.Top;