Docs: update location of iso files some people with old hardware may need to restore with older versions of EMC2.
Docs: update location of iso files
some people with old hardware may need to restore with older versions
of EMC2.

Signed-off-by: John Thornton <831ddba0f9954b83b568ccc203bee09efc068d05@gmail.com>

ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror