Corrected silkscreen labels for right side COL/ROWs

This release adds two 3d printable tray case options that you can find in their relative folders as well as in the release assets:

• https://github.com/duckyb/urchin/tree/master/3d-prints

The gerbers for the PCB are the same as last release, since no changes were made (yet).

Thanks to: @iamDrakkir and @chewiedies for the awesome cases.

The first prototype order of the Urchin has been placed using the gerber that you can download below.
I have built this version and everything is working as expected.