Update free-trial-faq.md
Update free-trial-faq.md

Added verbiage to specify support levels can be upgraded at any time.
jtowns3/PublicKB,daveshac/PublicKB,StephanieWong/PublicKB,jwebs1/PublicKB,anthonyvetter/PublicKB,DLM1/PublicKB,robertlesieur/PublicKB,robcaldwell/PublicKB,jwcolbert/PublicKB,mfar78/PublicKB,ack/PublicKB