Update part-one-arrays.js comments

Author: jwoolbright23

arrays/exercises/part-one-arrays.js

@@ -1,5 +1,5 @@
-//Create an array that can hold 4 items name practiceFile.
+//Create an array called practiceFile with the following entry: 273.15
 
 //Use the bracket notation method to add "42" and "hello" to the array. Add these new items one at a time.  Print the array after each step to confirm the changes.
 
-//Use a SetValue to add the items "false", and "-4.6" to the array.  Print the array to confirm the changes.
+//Use a single .push() to add the following items: false, -4.6, and "87".  Print the array to confirm the changes.