e2e: master -> main branch name

[tobiasKaminsky]

🖼️ Screenshots

🏚️ Before	🏡 After
B	A

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included 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?)

🤖 AI (if applicable)

• The content of this PR was partly or fully generated using AI

[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/27815052862/artifacts/7745462696
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	33	33
Correctness	67	67
Dodgy code	214	214
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	31	31
Performance	41	41
Security	16	16
Total	412	412

[github-actions]

blue-Light-Screenshot test failed, but no output was generated. Maybe a preliminary stage failed.