ci(32bit): fix failing test setup

[blizzz]

We see the 32bit tests failing in the setup. The used image is Debian Bookworm based, and there is yet unreleased commit in setup-php that might help.

For example, failing tests setup at https://github.com/nextcloud/server/actions/runs/5509732480/jobs/10073230086?pr=39282

[blizzz]

/backport to stable27

[blizzz]

/backport to stable26

[backportbot-nextcloud]

The backport to stable27 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable27
git pull origin stable27
# Create the new backport branch
git checkout -b fix/foo-stable27
# Cherry pick the change from the commit sha1 of the change against the default branch# This might cause conflicts. Resolve them.
git cherry-pick abc123
# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable27

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport

[backportbot-nextcloud]

The backport to stable26 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable26
git pull origin stable26
# Create the new backport branch
git checkout -b fix/foo-stable26
# Cherry pick the change from the commit sha1 of the change against the default branch# This might cause conflicts. Resolve them.
git cherry-pick abc123
# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable26

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport