fix text for assigned acl managers not being readable in light mode

[icewind1991]

currently it's grey text on grey background in light mode.

[icewind1991]

/backport to stable25

[icewind1991]

/backport to stable24

[backportbot-nextcloud]

The backport to stable24 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable24
git pull origin/stable24

# Create the new backport branch
git checkout -b fix/foo-stable24

# 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-stable24

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

[icewind1991]

/backport to stable26

[provokateurin]

Could we get new releases with this fix?

[icewind1991]

fix has been released