fix: updated notifications section url

[awais-ansari]

Description

Updated the notifications preferences section URL which is used on different MFEs to redirect the user to the notifications preferences center.

Old URL: https://account.edx.org/notifications
New URL: https://account.edx.org/#notifications

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.99%. Comparing base (7d47602) to head (160b158).
Report is 2 commits behind head on 2u-main.

Additional details and impacted files

@@           Coverage Diff            @@
##           2u-main    #1185   +/-   ##
========================================
  Coverage    57.99%   57.99%           
========================================
  Files          119      119           
  Lines         2376     2376           
  Branches       658      655    -3     
========================================
  Hits          1378     1378           
  Misses         931      931           
  Partials        67       67           

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