[GRASS-git] [OSGeo/grass-promo] 534503: Add logo in circle with background (#2)

[Vaclav Petras]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass-promo
  Commit: 534503469d83e0e058595e6a616e7c201cfe5ab1
      https://github.com/OSGeo/grass-promo/commit/534503469d83e0e058595e6a616e7c201cfe5ab1
  Author: Vaclav Petras <wenzeslaus at gmail.com>
  Date:   2022-11-14 (Mon, 14 Nov 2022)

  Changed paths:
    M README.md
    M grasslogo/README.md
    A grasslogo/github_social_preview.png
    A grasslogo/social_circle.png
    A grasslogo/social_circle.svg
    A grasslogo/social_circle_white_logo_only.png

  Log Message:
  -----------
  Add logo in circle with background (#2)

- White version of the logo on grass background centered so that it fits in a circle.
- PNGs with the background and without suitable for Google and YouTube accounts.
- Missing PNG for GitHub social preview.
- More generic image for the main readme.