Action Caching broken on Windows

According to the logs of https://github.com/AlgebraicJulia/CombinatorialSpaces.jl/actions/runs/11620242208/job/32361595023#step:5:127

Looks like issues with the path separator and it just being removed

`mkdir -p C:\Users\runneradmin/.julia`

This becomes this when executed:

Run `mkdir -p C:Usersrunneradmin/.julia`

This looks like it is fixed in the follwing PR https://github.com/julia-actions/cache/pull/146

We need to be using the release https://github.com/julia-actions/cache/releases/tag/v2.0.5