[YARDStick] 3v3 and GND IO short circuit

[赵焕思]

Hello 

I am coming again. I plan to make a few YARD Stick One myself, I am also doing it, and the project files I downloaded at GITHUB. Open it with KICAD, export the gerber file, hand it to the factory for production, and purchase the original according to the BOM list. Now that the PCB is finished, the SMT patch is complete. Then I couldn't flash the firmware with GOODFET, and then after testing, I found that 3.3V and GND of the back test point were short-circuited. A total of 15 production, all short-circuit phenomenon, I can not judge where the fault occurs, I hope to get your help. thank you very much. I am Zhao Huansi from China. Thanks again, sincerely! 
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