Update hreflang code of IN in yaml config

[beekerr]

Updated the hreflang language code to match changes on HTML lang:

https://github.com/adobecom/bacom/blob/stage/helix-sitemap.yaml

From:

      in:
        source: /in/query-index.json
        alternate: /in/{path}.html
        destination: /in/sitemap.xml
        hreflang: en-GB

To:

      in:
        source: /in/query-index.json
        alternate: /in/{path}.html
        destination: /in/sitemap.xml
        hreflang: en-IN

Resolves: https://jira.corp.adobe.com/browse/MWPW-154222

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.21%. Comparing base (36f1cb3) to head (d15a5dc).
Report is 33 commits behind head on stage.

Additional details and impacted files

@@           Coverage Diff           @@
##            stage     #222   +/-   ##
=======================================
  Coverage   96.21%   96.21%           
=======================================
  Files          11       11           
  Lines        1082     1082           
=======================================
  Hits         1041     1041           
  Misses         41       41           

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