CI: pin GitHub Action version

Author: azu

.github/workflows/website.yml

@@ -12,9 +12,9 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@cdca7365b2dadb8aad0a33bc7601856ffabcc48e # v4.3.0
         with:
           node-version: 18
       - name: Set Env
@@ -31,7 +31,7 @@ jobs:
           REPO_NAME: ${{ env.REPO_NAME }}
           HOMEPAGE: ${{ env.HOMEPAGE }}
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v4
+        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e # v4.0.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./dist