fix(ci): install dependencies in publish job for prepack script

The publish job was failing because backstage-cli was not available
when npm publish triggered the prepack lifecycle script.

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

Author: talissoncosta

.github/workflows/publish-release.yml

@@ -62,6 +62,10 @@ jobs:
         with:
           node-version: '22'
           registry-url: 'https://registry.npmjs.org'
+          cache: 'yarn'
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
 
       - name: Publish to NPM
-        run: npm publish --access public
+        run: npm publish --access public --provenance