Small fix to running-on-linux instructions (#64)

Author: fghalasz

content/en/running/running-on-linux.md

@@ -140,16 +140,16 @@ To install and run Medley locally:
 	In a terminal:
 
 	```
-	ubuntu@oio:~$ mkdir <medley_directory>
-	ubuntu@oio:~$ tar -C <medley_directory> -xzf <tar_filepath>
+	ubuntu@oio:~$ mkdir <interlisp_directory>
+	ubuntu@oio:~$ tar -C <interlisp_directory> -xzf <tar_filepath>
 	```
   
 4. Run Medley
 
 	In a terminal:
 
 	```
-	ubuntu@oio:~$ cd <medley_directory>
+	ubuntu@oio:~$ cd <interlisp_directory>/medley
 	ubuntu@oio:~$ ./medley
 	```