chore: update GitHub Actions workflow — install latest npm version before running tests and publishing

Author: sambharia

.github/workflows/publish.yml

@@ -15,6 +15,7 @@ jobs:
         with:
           node-version: "20.x"
           registry-url: "https://registry.npmjs.org"
+      - run: npm install -g npm@latest
       - run: npm ci
       - run: npm test
       - run: npm publish --provenance --access public