docs: update vgv logo (#23)

README.md

@@ -1,6 +1,7 @@
 # Pub Updater
 
-[![Very Good Ventures][logo]][very_good_ventures_link]
+[![Very Good Ventures][logo_white]][very_good_ventures_link_dark]
+[![Very Good Ventures][logo_black]][very_good_ventures_link_light]
 
 Developed with 💙 by [Very Good Ventures][very_good_ventures_link] 🦄
 
@@ -44,11 +45,14 @@ void main() async {
 [ci_badge]: https://github.com/VeryGoodOpenSource/pub_updater/actions/workflows/pub_updater.yaml/badge.svg?branch=main
 [ci_link]: https://github.com/VeryGoodOpenSource/pub_updater/actions/workflows
 [coverage_badge]: https://raw.githubusercontent.com/VeryGoodOpenSource/pub_updater/main/coverage_badge.svg
-[logo]: https://raw.githubusercontent.com/VeryGoodOpenSource/very_good_cli/main/doc/assets/vgv_logo.png
+[logo_black]: https://raw.githubusercontent.com/VeryGoodOpenSource/pub_updater/main/assets/vgv_logo_black.png#gh-light-mode-only
+[logo_white]: https://raw.githubusercontent.com/VeryGoodOpenSource/pub_updater/main/assets/vgv_logo_white.png#gh-dark-mode-only
 [license_badge]: https://img.shields.io/badge/license-MIT-blue.svg
 [license_link]: https://opensource.org/licenses/MIT
 [pub_badge]: https://img.shields.io/pub/v/pub_updater.svg
 [pub_link]: https://pub.dev/packages/pub_updater
 [very_good_analysis_badge]: https://img.shields.io/badge/style-very_good_analysis-B22C89.svg
 [very_good_analysis_link]: https://pub.dev/packages/very_good_analysis
 [very_good_ventures_link]: https://verygood.ventures
+[very_good_ventures_link_dark]: https://verygood.ventures#gh-dark-mode-only
+[very_good_ventures_link_light]: https://verygood.ventures#gh-light-mode-only