Change donation link (#1)

Author: avivace

debian/upstream/metadata

@@ -2,7 +2,7 @@ Bug-Database: https://github.com/gbdev/rgbds/issues
 Bug-Submit: https://github.com/gbdev/rgbds/issues/new
 Changelog: https://github.com/gbdev/rgbds/releases
 Documentation: https://rgbds.gbdev.io/docs
-Donation: https://github.com/sponsors/avivace
+Donation: https://opencollective.com/gbdev
 FAQ: https://rgbds.gbdev.io/faq
 Repository: https://github.com/gbdev/rgbds.git
 Repository-Browse: https://github.com/gbdev/rgbds