Update doc as per changes in `-J` option (#1885)
Update doc as per changes in `-J` option (#1885)

With changes in launch command options, `-J` is no longer used to provide java option to forked JVM.
alexarchambault/coursier,coursier/coursier,coursier/coursier,alexarchambault/coursier,alexarchambault/coursier,coursier/coursier,alexarchambault/coursier,coursier/coursier