Use Node 24 in publish job to fix npm self-upgrade crash

The Update npm step was failing with "Cannot find module 'promise-retry'"
on Node 22.22.2 due to npm/cli#9151 — npm@latest cannot self-upgrade from
the npm bundled with Node 22.22.2. Node 24's bundled npm already includes
the upstream fix from npm/cli#9152.

Only the publish job is bumped; CI's Build & Test jobs stay on Node 22.

Fixes #530

Author: asimgunes

.github/workflows/build-push.yml

@@ -111,7 +111,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: '22'
+          node-version: '24'
           registry-url: 'https://registry.npmjs.org'
       - name: Update npm (OIDC/provenance support)
         run: npm i -g npm@latest