update pnpm action version

Author: CaptainCodeman

.github/workflows/deploy.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Install pnpm
         uses: pnpm/action-setup@v2
         with:
-          version: 8
+          version: 9
 
       - name: Install Node.js
         uses: actions/setup-node@v3