add github link

Author: andrejpk

.github/workflows/publish-github.yml

@@ -41,7 +41,7 @@ jobs:
       - uses: actions/setup-node@v1
         with:
           node-version: 12
-          registry-url: $registry-url(npm)
+          registry-url: https://npm.pkg.github.com
       - run: yarn
       - run: yarn build
       - run: yarn publish --non-interactive --verbose