Update README, instruct users to always open an issue
Update README, instruct users to always open an issue

ar-jan/restic,howeyc/restic,kurin/restic,byo/restic,fawick/restic,middelink/restic,middelink/restic,restic/restic,byo/restic,stuertz/restic,fawick/restic,jayme-github/restic,ar-jan/restic,restic/restic,arithmetric/restic,stuertz/restic,kurin/restic,episource/restic,ckemper67/restic,mappu/restic,jayme-github/restic,bchapuis/restic