Notify Fenne instead of Sven

[bvreede]

Sorry this took a while @svenvanderburg @FenneRiemslagh!

@liekelotte For review: I ran into some issues with Microsoft authentication >.< and installing the httpuv package helped; hence the added dependency in the Description file.

If you want to test-drive the updated function, you can use this code:

old_workshop = traininginfrastructure::read_from_drive() |> traininginfrastructure::get_future_workshops(future = "none")
View(old_workshop) # this is to check what old workshop to pick; I chose the R packaging one
old_r_workshop = old_workshop[3,] # select the old workshop here depending on the number
save_post_sharepoint(old_r_workshop)

Closes #61

[svenvanderburg]

P.s. Nice that we can pass the name now :) (also taking into account future pregnancies 👶 )