Fixed variable names for clock time constants to follow naming conventions

Author: Maryanne-K

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

@@ -1,2 +1,2 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+const twentyFourHourClockTime = "20:53";
+const twelveHourClockTime = "08:53";