Tests

Fix generation of multiple bibliography sections #21216

Job	Run time
Markdown	5s
CHANGELOG.md	10s
Modernizer	1m 13s
Checkstyle	2m 17s
OpenRewrite	1m 56s
CHANGELOG.md - only unreleased touched	15s
Code coverage	34s
Database tests	2m 37s
Validate Gradle Wrapper	5s
GUI tests	1m 26s
Find merge conflicts	7s
Source branch is other than "main"	1s
Validate requirement coverage	24s
Unit tests	3m 58s
upload-pr-number	3s
	15m 11s

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