Update GitHub action versions

.github/workflows/deploy.yml

@@ -12,11 +12,11 @@ jobs:
 
     steps:
       - name: Checkout branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 20
           cache: 'npm'
       - name: Clean install dependencies
         run: npm ci
@@ -37,13 +37,13 @@ jobs:
           git tag v${{ steps.version-check.outputs.version }}
       - name: Publish user style changes
         if: steps.version-check.outputs.changed == 'true'
-        uses: ad-m/github-push-action@v0.6.0
+        uses: ad-m/github-push-action@v0.8.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           branch: ${{ github.ref }}
           tags: true
       - name: Deploy site
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./docs