Fix locale-aware representation of hours in Date class

[kuzmas]

This change fixes Date.toLocaleString() when the hour value is 11 or 12.

Example:

var dt = new Date('2023-03-10T11:23:05.123+13:00');
console.log(dt.toLocaleString());
dt = new Date('2023-03-10T12:23:05.123+13:00');
console.log(dt.toLocaleString());

Expected output:

03/10/2023, 11:23:05 AM
03/10/2023, 12:23:05 PM

Actual output:

03/10/2023, -1:23:05 AM
03/10/2023, 00:23:05 PM

[bellard]

good catch