Clarify movie length format in comments

Updated comment to clarify the format of movie length.

Author: AhmadHmedann

Sprint-1/3-mandatory-interpret/2-time-format.js

@@ -25,7 +25,7 @@ console.log(result);
 //calculate how long the move is in minutes.
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
-//MovieLengthH:M:S
+//MovieLengthH_M_S
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
 //It works for positive integers