fix: changed pagination label for select

[preetibansalui]

Closes #17974

Change label of select to Page instead of Page Number

Testing / Reviewing

1. Go to Pagination > Default story
2. Screen reader should announce page 1 of 11 pages when focus is on select menu for page number.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.36%. Comparing base (0da5e37) to head (f9bc441).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #18166   +/-   ##
=======================================
  Coverage   83.36%   83.36%           
=======================================
  Files         404      404           
  Lines       14344    14344           
  Branches     4646     4646           
=======================================
  Hits        11958    11958           
+ Misses       2225     2224    -1     
- Partials      161      162    +1     

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[2nikhiltom]

SR's announcements are more clear now. It reads "5, page of 11 pages" !! Thanks