[QS] Update night light time from 24 to 12-hr

Fixing a small typo (capitalization) in the date time pattern for the
formatter. This'll fix the time format for the night light's secondary
label.

Test: visual
Bug: 69973398
Change-Id: I1fd48b33e140bb3b6e0587be89e10297d036aa2a
1 file changed