ci: fix pnpm version usage

Author: WarningImHack3r

.github/workflows/pr-checks.yml

@@ -55,8 +55,6 @@ jobs:
 
       - name: 📥 Install pnpm
         uses: pnpm/action-setup@v4
-        with:
-          version: latest
 
       - name: 🧭 Setup Node
         uses: actions/setup-node@v4