MultiSelect: Label does not properly update when properties change

[doener006]

Describe the bug

The shown label is calculated using updateLabel(). This function depends on the fields selectedItemsLabel, maxSelectedLabels and displaySelectedLabel, where changing them does not trigger updateLabel(). Other fields the label depends on are already properties and trigger the update function in the setter.

Environment

N/A

Reproducer

No response

Angular version

^16.2.0

PrimeNG version

16.4.1

Build / Runtime

Angular CLI App

Language

TypeScript

Node version (for AoT issues node --version)

v18.16.1

Browser(s)

No response

Steps to reproduce the behavior

1. Create a p-multiselect with selectedItemsLabel, maxSelectedLabels and/or displaySelectedLabel
2. Select some items (The label changes in this case)
3. Update the selectedItemsLabel

Expected behavior

Label displayed in .p-multiselect-label should be updated on selectedItemsLabel, maxSelectedLabels or displaySelectedLabel change.