PharoTour - fix typo

Author: dmitrizagidulin

PharoTour/PharoTour.pillar

@@ -62,7 +62,7 @@ It is a good idea to keep a backup copy of the downloaded ==.image== and ==.chan
 files so you can always start from a fresh image and reload your code.
 
 The four main component files above can be placed in the same directory,
-although it's also possible to put the Virtual Machine and sources file in
+although it's also possible to put the Virtual Machine and sources file in a
 separate directory where everyone has read-only access to them.
 Do whatever works best for your style of working and your operating system.