chore(deps): update pnpm/action-setup action to v5

Author: renovate[bot]

.github/workflows/claude.yml

@@ -30,7 +30,7 @@ jobs:
           fetch-depth: 1
 
       - name: Install pnpm
-        uses: pnpm/action-setup@v4
+        uses: pnpm/action-setup@v5
 
       - name: Setup Node.js
         uses: actions/setup-node@v6