Download page should say "binaries" and also link for source building.

[thadguidry]

Download page should say "binaries" and also provide a link to say "for source code building Click Here" which points to the Technical Reference page for building.

We confused a Fedora user here: https://forum.openrefine.org/t/failed-to-install-from-source-on-fedora-36/1002/2

[Gauravkumar2701]

@thadguidry can i work this.