Update actions/cache action to v5.1.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/cache	action	minor	v5.0.5 → v5.1.0

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

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Release Notes

actions/cache (actions/cache)

v5.1.0

Compare Source

What's Changed

• Bump @​actions/cache to v5.1.0 - handle read-only cache access by @​jasongin in #​1775

Full Changelog: actions/cache@v5...v5.1.0

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[github-actions]

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

[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	32	32
Correctness	66	66
Dodgy code	213	213
Experimental	1	1
Malicious code vulnerability	2	2
Multithreaded correctness	29	29
Performance	41	41
Security	19	19
Total	403	403

[github-actions]

APK file: https://github.com/nextcloud/android/actions/runs/28652556960/artifacts/8063656617
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]

master-IT test failed: https://www.kaminsky.me/nc-dev/android-integrationTests/17279-IT-master-11-36