index error for ssh_known_hosts_file

[StefanKarpinski]

julia> ENV["SSH_KNOWN_HOSTS_FILES"] = ""
""

julia> ssh_known_hosts_files()
String[]

julia> ssh_known_hosts_file()
ERROR: BoundsError: attempt to access 0-element Vector{String} at index [1]
Stacktrace:
 [1] getindex
   @ ./array.jl:787 [inlined]
 [2] ssh_known_hosts_file()
   @ NetworkOptions ~/dev/julia/usr/share/julia/stdlib/v1.6/NetworkOptions/src/ssh_options.jl:141
 [3] top-level scope
   @ REPL[30]:1