Update GitHub Actions to use newer action versions

Author: sfxcode

.github/workflows/deploy-docs.yml

@@ -33,13 +33,14 @@ jobs:
       run:
         working-directory: docs
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v6.0.2
 
-      - name: Setup Node
-        uses: actions/setup-node@v4
+      - uses: pnpm/action-setup@v5.0.0
+
+      - uses: actions/setup-node@v6.4.0
         with:
-          node-version: '24'
+          node-version: 24
+          cache: pnpm
 
       - name: Install dependencies
         run: cd .. && pnpm install --frozen-lockfile