Fix typo (#224)

Author: kensanata

content/en/project/_index.md

@@ -12,7 +12,7 @@ aliases:
 
 ## What are we trying to accomplish?
 
-Our aim is to allow Medley to "live again": to be useable enough on modern systema that someone could develop some code and experience what it was like to use this groundbreaking system. You could think of this as a kind of "*vintage software*" project, to try to capture the sense of fluidity in the development cycle. 
+Our aim is to allow Medley to "live again": to be useable enough on modern systems that someone could develop some code and experience what it was like to use this groundbreaking system. You could think of this as a kind of "*vintage software*" project, to try to capture the sense of fluidity in the development cycle. 
 
 We also hope to provide a platform for revival of systems developed using Interlisp., including 1980's work in hypertext (Notecards), desktop management (Rooms), and object-oriented programming (LOOPS).