Update HowToVisitPSS.md

HowToVisitPSS.md

@@ -6,6 +6,7 @@ The Team is located at 6th and 7th floor at Lamarck-A building.
 The address is  35 rue Hélène Brion, 75013 Paris
 
 Once in the lobby, of the main entrance, take the elevators on the right up to the 6th floor.
+
 Then take the corridor on the right and stop at the only single front door with IPGP's logo on it.
 
 This is where we are.