Pull Request resolves #46495

• I read the Generative AI policy and my contribution is either not created with the help of AI or is compatible with the policy and GNU/GPL 2 or later.

Summary of Changes

This PR fixes the deletion logic for update archives after automated updates. The root issue is that the update API did not correctly return the archive filename to the server.

Testing Instructions

• Enable autoupdates in com_joomlaupdate and copy the token
• Modify the version.php to an older version to be able to prepare an update using the autoupdate API
• call the update preparation endpoint using curl or an http client of your choice

curl --location 'http://URL_OF_YOUR_SITe/api/index.php/v1/joomlaupdate/prepareUpdate' \
--header 'X-JUpdate-Token: YOUR_TOKEN' \
--header 'Content-Type: application/json' \
--data '{"targetVersion":"5.4.5"}'

Actual result BEFORE applying this Pull Request

• no filename returned in response

Expected result AFTER applying this Pull Request

• filename returned in response

Link to documentations

Please select:

• Documentation link for guide.joomla.org:

• No documentation changes for guide.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed