[PipsPager Control] Narrator remains silent upon invoking "Next page/Previous page" button

### Describe the bug

You can refer to bug link: https://microsoft.visualstudio.com/DefaultCollection/OS/_workitems/edit/56727518/

As is described in the title, When multiple click next/previous page in pipsPager, narrator will only read 'next/previous button' once at the first time, then remains silent.

This does not meet the requirements of A11Y.

### Steps to reproduce the bug

https://github.com/user-attachments/assets/b3c14dcc-1141-41f6-950a-c757f1fa6989

This can be reproduced by any narrator

### Expected behavior

_No response_

### Screenshots

_No response_

### NuGet package version

None

### Windows version

_No response_

### Additional context

_No response_

Start with the PipsPager control and the linked reproduction video, then reproduce repeated Next page and Previous page invocations with Narrator. The issue mentions no source files or tests; done means Narrator announces each button invocation rather than remaining silent after the first.

Written by the indexing model from the issue text.