"not" is missing from the CLA

[nimeratus]

https://github.com/scratchfoundation/scratch-agreements/blob/main/CLA.md#3-originality-of-work

You represent and warrant that each of your Contributions is entirely your original work, and that the Contribution, whether alone or in combination with the Project, will infringe upon or misappropriate the intellectual property or other rights of any third party.

I think this should be "will not"

[nimeratus]

@cwillisf