Update Gradle Wrapper from 8.11.1 to 8.12 #663

Job	Run time
Checkstyle	2m 47s
OpenRewrite	3m 1s
CHANGELOG.md	12s
Modernizer	1m 42s
CHANGELOG.md - only unreleased touched	16s
Markdown	8s
Unit tests	7m 35s
Database tests	3m 11s
GUI tests	2m 8s
Code coverage	32s
Find merge conflicts	5s
Validate Gradle Wrapper	5s
Validate requirement coverage	45s
Source branch is other than "main"	4s
upload-pr-number	6s
	22m 37s

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