Small fixes on some USB connectors
While working on https://github.com/KiCad/kicad-footprints/pull/2055 i looked at some other USB footprints.
- USB3_A_Plug_Wuerth_692112030100_Horizontal
- Improve description
- USB_A_CNCTech_1001-011-01101_Horizontal
- Add Pin1 Marker
- Improve description