ci: bump GitHub Actions to Node.js 24 majors

Eliminates the Node.js 20 runtime deprecation warning.

- actions/checkout v4 -> v6
- actions/setup-node v4 -> v6
- pnpm/action-setup v4 -> v5
- actions/configure-pages v5 -> v6
- actions/upload-pages-artifact v3 -> v5
- actions/deploy-pages v4 -> v5

Author: areyoubugcoder

.github/workflows/deploy.yml

@@ -19,15 +19,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v4
+        uses: pnpm/action-setup@v5
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 20
           cache: pnpm
@@ -39,10 +39,10 @@ jobs:
         run: pnpm build
 
       - name: Setup Pages
-        uses: actions/configure-pages@v5
+        uses: actions/configure-pages@v6
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v5
         with:
           path: .vitepress/dist
 
@@ -55,4 +55,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5