Update with new DPG badge

[Ainali]

Description

Badges still CC 0, as documented on https://github.com/DPGAlliance/dpg-resources/blob/main/docs/dpg-badge-usage.md

Checklist

Please ensure the following before submitting the PR:

• I have tested the changes locally, and they work as expected.
• The code follows the project's coding standards and conventions.

[RVA2869]

While you're at it 😄 could you also add the new badge to the repo page & the organization page?
I like this one

[Ainali]

While you're at it 😄 could you also add the new badge to the repo page & the organization page? I like this one

I changed our SVG, so those should automatically be updated. I was thinking about that badge, but it is ambiguous if that one is CC 0 or something that would require attribution. (Although perhaps one could argue it is not over the originality threshold.)

[Abbe98]

The contrast ends up being rather bad, do they happen to have a variant for dark backgrounds?

[Ainali]

Oh, this is a mistake by me. I was aiming to use the white one also added in this PR. Let me clean this up.

[Ainali]

The contrast ends up being rather bad, do they happen to have a variant for dark backgrounds?

Or wait. @Abbe98 Where is the contrast low? This PR is using the white version in the footer.