chore(deps): update dependency com.github.spotbugs to v6.4.8

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
com.github.spotbugs	6.4.7 -> 6.4.8

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[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	43	43
Correctness	74	74
Dodgy code	260	260
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	3	3
Multithreaded correctness	34	34
Performance	48	48
Security	18	18
Total	488	488

[github-actions]

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

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/16130.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.