Remove appveyor link from README.md (!6363) · Merge requests · Inkscape / inkscape · GitLab

PBS requested to merge pbs3141/inkscape:appveyor-readme into master Apr 19, 2024

Remove the link to https://ci.appveyor.com/project/inkscape/inkscape from README.md.

It's no longer used for Windows CI.
The last update was 3 years ago.
The last pipeline failed, so it causes "build: failing" to appear on https://gitlab.com/inkscape/inkscape.