Update data: Challenge.gov and citizenscience.gov

[lukefretwell]

Add domains:

• [ ] Challenge.gov
• [ ] citizenscience.gov

[lukefretwell]

Odd, because they weren't when I looked, but now are showing up:

• https://scangov.org/profile/?domain=challenge.gov#overview
• https://scangov.org/profile/?domain=citizenscience.gov#overview