chore(dep): bump relative-ci/agent-upload-artifact-action

[max-nextcloud]

Bumps actions/upload-artifact to v4 which is now required.

For a failing run see https://github.com/nextcloud/text/actions/runs/12813038066/job/35726156517?pr=6855 .

[max-nextcloud]

/backport to stable30

[max-nextcloud]

/backport to stable29

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.55%. Comparing base (bf7ba78) to head (93041f9).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6859   +/-   ##
=======================================
  Coverage   46.55%   46.55%           
=======================================
  Files         748      748           
  Lines       34318    34318           
  Branches     1242     1242           
=======================================
  Hits        15976    15976           
  Misses      17720    17720           
  Partials      622      622           

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[backportbot]

The backport to stable29 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable29
git pull origin stable29

# Create the new backport branch
git checkout -b backport/6859/stable29

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick 93041f95

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/6859/stable29

Error: No changes found in backport branch

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.