p-calendar month picker doesn't display correct year

[DerStimmler]

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[x] bug report => Search github for a similar issue or PR before submitting
[ ] feature request => Please check if request is not on the roadmap already https://github.com/primefaces/primeng/wiki/Roadmap
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Plunkr Case (Bug Reports)

https://stackblitz.com/edit/github-rgjy7j?file=src/app/app.component.html
https://github-rgjy7j.stackblitz.io

Current behavior
When you have a month picker and click on the arrows to switch the current year, the label of the year doesn't change.

Expected behavior
The label of the year should change when switching the year.

Minimal reproduction of the problem with instructions
Just add a p-calendar component with the view attribute set to "month".
<p-calendar view="month" dateFormat="mm/yy" [readonlyInput]="true"></p-calendar>

What is the motivation / use case for changing the behavior?
It should work properly.

Please tell us about your environment: Windows, Linux

• Angular version: 12.X

• PrimeNG version: 13.0.4

• Browser: all

• Language: all

• Node (for AoT issues): node --version = 14.15.0

[DerStimmler]

The bug exists also in the PrimeNG documentation: https://www.primefaces.org/primeng/showcase/#/calendar

[DerStimmler]

Same as #11024 .
Is fixed in v13.1.0