Fix npm trusted publishing - upgrade npm CLI to latest. (#10)

GitHub runners have npm 10.x but trusted publishing requires npm 11.5.1+.
Also restore registry-url to setup-node for proper .npmrc configuration.

Author: peteski22

.github/workflows/release.yaml

@@ -36,6 +36,10 @@ jobs:
         uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5.0.0
         with:
           node-version: '22'
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Install latest npm
+        run: npm install -g npm@latest
 
       - name: Install dependencies
         run: npm ci