chore: update Node.js version and pnpm installation in CI workflow

- Changed Node.js version from 20 to 22.
- Updated pnpm installation to version 9.4.0.

Author: ogroppo

.github/workflows/npm-publish.yml

@@ -18,9 +18,9 @@ jobs:
       - name: setup node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22
       - name: install pnpm
-        run: npm i pnpm@latest -g
+        run: npm i pnpm@9.4.0 -g
       - name: Setup npmrc
         run: echo "//registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }}" > .npmrc
       - name: setup pnpm config