Add changelog for 3.29.0 RC1

[tobiasKaminsky]

trafficstars

[github-actions[bot]]

Lint

Type	stable-3.29	PR
Warnings	71	71
Errors	3	3

SpotBugs

Category	Base	New
Bad practice	67	67
Correctness	72	72
Dodgy code	345	345
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	6	6
Performance	57	57
Security	19	19
Total	576	576

[github-actions[bot]]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/12892.apk



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

[github-actions[bot]]

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