Sponsor link is broken

[asinghvi17]

The sponsor link on the Github front page of the repo seems to point to Bonterra's website.

[jpsamaroo]

Thanks for the heads-up! I've updated it to point to the NumFOCUS generic donation page (where you can direct funds to a specific project if desired). I should probably come up with something more Dagger-specific, but in the meantime, this will suffice. I'll leave this open for now as a reminder for myself 😄