MWPW-136691 Add AU-US and UK-US indexes

[meganthecoder]

• Add AU-US and UK-US indexes for article feeds

Resolves: MWPW-136691

Test URLs:
N/A

[aem-code-sync]

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[codecov-commenter]

Codecov Report

Merging #18 (10a5b2e) into main (cb3346a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #18   +/-   ##
=======================================
  Coverage   86.36%   86.36%           
=======================================
  Files           2        2           
  Lines         176      176           
=======================================
  Hits          152      152           
  Misses         24       24           

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