Update brown.mdx

docs/variant-specific/brown.mdx

@@ -32,7 +32,7 @@ These conventions apply to any variant with a brown (touched by no ranks) suit.
 
 - [_Loaded Play Clues_](../variant-specific.mdx#the-loaded-play-clue-in-hard-variants-lpc) are always "turned on" for brown cards, according to the [_Always Loaded Principle_](../variant-specific.mdx#the-always-loaded-principle-alp).
 
-### Positional Clues
+### Brown Positional Clues
 
 - In some situations, a player may have multiple brown cards in their hand, with one of them being playable. If the playable brown card is not the oldest card, it can be difficult to "get" the card to play.
 - In cases where a number clue is given that has no other conventional interpretation, it is an indication to the player with two or more brown cards of which slot to play.