Fix variable naming for consistency in 4.js

Author: JohnRob-jnr

Sprint-1/2-mandatory-errors/4.js

@@ -1,2 +1,2 @@
-const 12HourClockTime = "8:53 pm";
-const 24hourClockTime = "20:53";
+const TwelveHourClockTime = "8:53 pm";
+const TwentyFourHourClockTime = "20:53";