lstopo.1: fix a typo in the new GRAPHICAL section

Signed-off-by: Brice Goglin <[email protected]>

Author: bgoglin

utils/lstopo/lstopo-no-graphics.1in

@@ -548,7 +548,7 @@ as a tree of bridges with links between them.
 The tree starts with a small square on the left for the
 hostbridge or root complex.
 It ends with PCI device boxes on the right.
-Intermediate PCI bridges switches may appear as additional small
+Intermediate PCI bridges/switches may appear as additional small
 squares in the middle.
 
 PCI devices on the right of the tree are boxes containing