Update actions/checkout action to v6.0.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	patch	v6.0.2 → v6.0.3

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Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

actions/checkout (actions/checkout)

v6.0.3

Compare Source

• Fix checkout init for SHA-256 repositories by @​yaananth in #​2439
• fix: expand merge commit SHA regex and add SHA-256 test cases by @​yaananth in #​2414

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[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	33	33
Correctness	67	67
Dodgy code	215	215
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	31	31
Performance	41	41
Security	16	16
Total	413	413

[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/26999440449/artifacts/7430357025
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]

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