chore: use correct package metadata

[susnux]

• The library is located in nextcloud-libraries organization.
• Author for our libraries is "Nextcloud GmbH and Nextcloud contributors", individual contributors are listed in AUTHORS.md

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.00%. Comparing base (74f572d) to head (7a58cbe).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #924   +/-   ##
=======================================
  Coverage   70.00%   70.00%           
=======================================
  Files           4        4           
  Lines          80       80           
  Branches       23       23           
=======================================
  Hits           56       56           
  Misses         19       19           
  Partials        5        5           

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