docs: fix missing backtick in file authentication docs (#3348)
docs: fix missing backtick in file authentication docs (#3348)

Co-authored-by: James Elliott <87071fd3955111815744f01080f64a1f73f3e8d6@users.noreply.github.com>
clems4ever/two-factor-auth-server,clems4ever/two-factor-auth-server