attach build to GH release

Author: phryneas

.github/workflows/release.yml

@@ -61,6 +61,15 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
 
+      - name: Attach VSX to GitHub release
+        if: steps.changesets.outcome == 'success' && steps.changesets.outputs.published == 'true'
+        run: |
+          npx -y @vscode/vsce package --out "vscode-apollo-$VERSION.vsix"
+          gh release upload "v$VERSION" "vscode-apollo-$VERSION.vsix"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          VERSION: ${{steps.changesets.outputs.publishedPackages[0].version}}
+
       - name: Publish to Open VSX Registry
         if: steps.changesets.outcome == 'success' && steps.changesets.outputs.published == 'true'
         uses: HaaLeo/publish-vscode-extension@v1