Update the Symbol of USBLC6-2P6 & USBLC6-2SC6

This is my first merge request to this repository, if there are any issues, please tell me I will resolve them.

I updated the symbol of the USBLC6-2P6 and USBLC6-2SC6 TVS diode arrays to allow for a cleaner schematic. I attached a screenshot of the changes and also how the updated symbol looks in a schematic. (It shows an alternative Würth part number, but the symbol is the same).