Fix link in CONTRIBUTING.md #19363

Job	Run time
Checkstyle	1m 55s
OpenRewrite	2m 26s
Modernizer	1m 3s
CHANGELOG.md	8s
Markdown	5s
CHANGELOG.md - only unreleased touched	15s
Database tests	2m 46s
Unit tests	1m 7s
GUI tests	1m 14s
Code coverage	38s
Validate requirement coverage	26s
Validate Gradle Wrapper	4s
Find merge conflicts	5s
Source branch is other than "main"	2s
upload-pr-number	3s
	12m 17s

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