build(qa): Switch deprecated set-output to $GITHUB_OUTPUT

[joshtrichards]

https://github.blog/changelog/2023-07-24-github-actions-update-on-save-state-and-set-output-commands/

🖼️ Screenshots

🏚️ Before | 🏡 After

N/A

🚧 TODO

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not needed
• 🔖 Capability is checked or not needed
• 🔙 Backport requests are created or not needed: /backport to stable-xx.x
• 📅 Milestone is set
• 🌸 PR title is meaningful (if it should be in the changelog: is it meaningful to users?)

[github-actions]

Codacy

Lint

Type	master	PR
Warnings	79	90
Errors	10	129

SpotBugs

Category	Base	New
Bad practice	6	6
Correctness	11	11
Dodgy code	84	84
Internationalization	3	3
Malicious code vulnerability	3	3
Performance	6	6
Security	1	1
Total	114	114

Lint increased!

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/3980-talk.apk



To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud Talk app.