Chore(deps): Bump org.apache.maven.plugins:maven-site-plugin from 3.20.0 to 3.21.0 #4357

Job	Run time
site (Java 17)	6m 19s
build-only (Java 17)	4m 27s
test Java 11 (no-build)	47s
test (ubuntu, Java 17)	7m 24s
test (ubuntu, Java 21)	7m 24s
test (windows, Java 17)	8m 29s
test (windows, Java 21)	10m 35s
codecov-upload (Upload to codecov.io)	11s
	45m 36s

Provide feedback