diff on ranges ZonesDateTimes errors

[oxinabox]

Consider

julia> using Dates

julia> using TimeZones

julia> diff(ZonedDateTime(DateTime(2021,1,1), tz"UTC"):Hour(1):ZonedDateTime(DateTime(2021,1,2), tz"UTC"))
ERROR: MethodError: Cannot `convert` an object of type Millisecond to an object of type ZonedDateTime
Closest candidates are:
  convert(::Type{T}, ::T) where T at essentials.jl:205
  ZonedDateTime(::Union{Period, TimeZone}...) at /home/oxinabox/.julia/packages/TimeZones/y3gf6/src/types/zoneddatetime.jl:136
Stacktrace:
 [1] setindex!(A::Vector{ZonedDateTime}, x::Millisecond, i1::Int64)
   @ Base ./array.jl:839
 [2] diff(r::StepRange{ZonedDateTime, Hour}; dims::Int64)
   @ Base ./multidimensional.jl:966
 [3] diff(r::StepRange{ZonedDateTime, Hour})
   @ Base ./multidimensional.jl:965
 [4] top-level scope
   @ REPL[32]:1

Interesting Julia gets this wrong, but doesn't error https://github.com/JuliaLang/julia/issues/41336

If we collect it we get the right answer

julia> diff(collect(ZonedDateTime(DateTime(2021,1,1), tz"UTC"):Hour(1):ZonedDateTime(DateTime(2021,1,2), tz"UTC")))

24-element Vector{Millisecond}:
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds
 3600000 milliseconds