Fix t-nut in 2020 profile #3DThursday #3DPrinting

Curimind shares: This part encapsulate a t-nut so that the t-nut will not come loose by mistake. However the ability to easily remove the t-nut will be lost.download the files on: https://www.thingiverse.com/thing:5465189 Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making...