Update repositories.html.md
Update repositories.html.md

added a note for the rhel-7-server-rpms
weshayutin/website,hguemar/website,weshayutin/website,hguemar/website,hguemar/website,weshayutin/website,hguemar/website,weshayutin/website,weshayutin/website,hguemar/website