Thicker MakerGear Bed Clip

I tend to over-tighten the bed clips which causes them to bend and eventually break. So I just made the horizontal section of the clip as thick as possible without changing the overall design.

This does work much better. Now I can tighten more without bending or cracking a clip.

This is modified from the STL files provided by MakerGear in this repository: https://github.com/MakerGear/M2