Disable window tests on all platforms except Windows

Author: s1hofmann

.github/workflows/snapshot_release.yaml

@@ -36,7 +36,7 @@ jobs:
           working-directory: ./test/
           run: npm cit
       - name: Run window tests
-        if: ${{matrix.os != 'macos-11'}}
+        if: ${{matrix.os == 'windows-2019'}}
         uses: GabrielBB/xvfb-action@v1
         with:
           working-directory: ./test/window-integration-tests