Add OVSX publish step to release workflow (#21)

Author: alaycock-stripe

.github/workflows/release.yml

@@ -21,6 +21,7 @@ jobs:
       - run: npm ci
       - run: npm run build
       - run: npx vsce publish -p ${{ secrets.VSCODE_MARKET_TOKEN }}
+      - run: npx ovsx publish -p ${{ secrets.OVSX_PAT }}
       - run: cp -r dist/server server/dist # Move server build into server dir
       - run: cp README.md server
       - run: npm publish --access public