Remove npm cache from setup-node to avoid cache timeout in CI

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -21,8 +21,6 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: '22'
-          cache: 'npm'
-          cache-dependency-path: client/package-lock.json
 
       - name: Install dependencies
         run: npm ci