update dependencies, The following actions uses Node.js version which…

… is deprecated and will be forced to run on node20: actions/checkout@v2, peaceiris/actions-hugo@v2, actions/cache@v2, actions/setup-node@v3, peaceiris/actions-gh-pages@v3

.github/workflows/gh-pages.yml

@@ -8,36 +8,36 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Git checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           submodules: true  # Fetch Hugo themes (true OR recursive)
           fetch-depth: 0    # Fetch all history for .GitInfo and .Lastmod
           ref: main
 
       - name: Setup Hugo
-        uses: peaceiris/actions-hugo@v2
+        uses: peaceiris/actions-hugo@v3
         with:
           hugo-version: '0.128.2'
           extended: true
 
       - name: Cache Hugo modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: /tmp/hugo_cache
           key: ${{ runner.os }}-hugomod-${{ hashFiles('**/go.sum') }}
           restore-keys: |
             ${{ runner.os }}-hugomod-
 
       - name: Setup Node
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: '14'
+          node-version: '20'
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.npm
           key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
@@ -51,7 +51,7 @@ jobs:
         # run: hugo --gc
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}