fix: upgrade npm for OIDC trusted publishing support

npm 11.5.1+ is required for trusted publishing OIDC handshake.
Node.js 22 ships with npm v10 which doesn't support it.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: v1rtl

.github/workflows/release.yml

@@ -27,4 +27,5 @@ jobs:
       - run: bun i
       - run: bun run build
 
+      - run: npm install -g npm@latest
       - run: npm publish --provenance --access public