ci: fix npm auth for changesets/action@v2 via setup-node registry-url

v2 removed automatic .npmrc creation from NPM_TOKEN (changesets/action#695);
token auth now goes through setup-node's registry-url + NODE_AUTH_TOKEN.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: DaYePython

.github/workflows/release.yml

@@ -27,6 +27,7 @@ jobs:
         with:
           node-version: 24
           cache: pnpm
+          registry-url: 'https://registry.npmjs.org'
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
@@ -49,4 +50,4 @@ jobs:
           create-github-releases: true
           push-git-tags: true
         env:
-          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}