Update HowToVisitPSS.md

HowToVisitPSS.md

+# How To Visit PSS @ Lamarck
 
 
+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.
 
 ![](lmk.png)