update maven-site-plugin to 3.7.1

[nomuna]

Fix #14991

fixes

java.lang.NoClassDefFoundError: org/apache/maven/doxia/siterenderer/DocumentContent

during

mvn site

---

Please make sure the below checklist is followed for Pull Requests.

• All continuous integration tests are green
• Tests are added where necessary
• The JDL part is updated if necessary
• jhipster-online is updated if necessary
• Documentation is added/updated where necessary
• Coding Rules & Commit Guidelines as per our CONTRIBUTING.md document are followed

When you are still working on the PR, consider converting it to Draft (bellow reviewers) and adding skip-ci label, you can still see CI build result at your branch.

[CLAassistant]

All committers have signed the CLA.

[nomuna]

Even though I have not changed anything that has whatsoever to do with react the react-maven-cassandra-session-redis is failing. I have looked in the logs. It is apparently an issue with the jackson-core not being included in that specific case...

Can someone have a look at this and see if it may be a different issue?

Update: I am also seeing outOfMemoryError for react-maven-cassandra-session-redis...

[atomfrede]

Thanks @nomuna and congrats to your first contribution. The failing build is unrelated and seems to be failing for at least two days as far as I can tell.