chore(deps): update dependency org.apache.maven.plugins:maven-site-plugin to v3.21.0 (main)

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.apache.maven.plugins:maven-site-plugin	3.20.0 -> 3.21.0

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Test Results

 4 files   4 suites   3s :stopwatch:  9 tests  9 :white_check_mark: 0 :zzz: 0 :x: 59 runs  59 :white_check_mark: 0 :zzz: 0 :x:

Results for commit df8b3bcc.