Using local time as UTC in the scratch tracking file

[omus]

The now() function returns the current time in the system's local time zone. The code here adds the Z suffix which indicates UTC time:

Scratch.jl/src/Scratch.jl

Line 150 in df4d656

"time = ", string(now()), "Z\n",

julia> using Dates

julia> @show now() now(UTC);
now() = DateTime("2022-07-13T09:56:50.017")
now(UTC) = DateTime("2022-07-13T14:56:50.018")