Update 2-Virtual-Machine.md

Author: tesivo

tutorial/en/2-Virtual-Machine.md

@@ -302,7 +302,7 @@ We've commented out `RET` because we'll replace it with `LEV` later.
 In practice the compiler should deal with more: how to pass the arguments to
 a function? How to return the data from the function?
 
-Our convention here about returning value is to store it into `AX` no mater
+Our convention here about returning value is to store it into `AX` no matter
 you're returning a value or a memory address. Then how about argument?
 
 Different language has different convension, here is the standard for C: