[stable30] Update @nextcloud/vue to v8.23.1

[susnux]

Summary

Required to fix some safari issues.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[AndyScherzinger]

/compile /

[susnux]

same needed for 31, but as we can not merge there until the final release I will create the PR afterwards (it will conflict too much otherwise).
So the fixes will be in 31.0.1.