si-timepicker should show PM meridian for noon when Date object is 12:xx

[spliffone]

Prerequisites

• I have read the Contributing Guidelines.
• I have not leaked any internal/restricted information like screenshots, videos, code snippets, links etc.

Affected component

No response

Summary

When a time with hours equal to 12 (noon) is written to the SiTimepickerComponent — for example 12:30 PM — the meridian <select> incorrectly displays AM instead of PM.

Version

@siemens/element-ng@48.11.0

Steps to reproduce

1. Use SiTimepickerComponent with a 12-hour clock locale or showMeridian="true".
2. Set the control value to any time between 12:00 and 12:59 in 24-hour format (i.e. noon through 12:59 PM).
3. Observe the meridian <select>.

What is the current bug behavior

In updateUI(), the condition used to determine the meridian from a 24-hour hours value was off-by-one:

// Before (wrong) — noon (hours === 12) evaluates to false → 'am'
this.meridian.set(hours > 12 ? 'pm' : 'am');

What is the expected correct behavior

24h hours	12h display	Expected meridian
0	12:00 AM (midnight)	AM
1–11	1–11 AM	AM
12	12:00 PM (noon)	PM
13–23	1–11 PM	PM

// After (correct) — noon (hours === 12) evaluates to true → 'pm'
this.meridian.set(hours >= 12 ? 'pm' : 'am');