SpringBoot Improve maven plugin tags documentation

As mentioned in https://github.com/spring-projects/spring-boot/issues/33528, I have updated the description of tags.

Comment From: scottfrederick

Thanks for the contribution @shekharAggarwal. We need to make the same change to the Gradle plugin documentation. Are you interested in making that change also?

If so, you can just push an additional commit to this branch and it will update the pull request.

Comment From: shekharAggarwal

Sure

Comment From: philwebb

Thanks!