docs: Fix broken link to backup instructions (#3064)
docs: Fix broken link to backup instructions (#3064)

Signed-off-by: Antoine Bardoux <f4d2b5550abbee253a74a63c75b3db80c2a45e7e@gmail.com>
gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport