Update deploy-gh-pages workflow to simplify pnpm setup

Remove pnpm version specification and installation step.

Author: logue

.github/workflows/deploy-gh-pages.yml

@@ -19,14 +19,10 @@ jobs:
 
       - uses: pnpm/action-setup@v4
         name: Install pnpm 📦
-        with:
-          version: 10
-          run_install: false
 
       - name: Install Node.js ⚡️
         uses: actions/setup-node@v4
         with:
-          node-version: 22
           cache: "pnpm"
 
       - name: Build 🔧