update: peaceiris/actions-mdbook@v2

Author: netpyoung

.github/workflows/deploy.yaml

@@ -15,7 +15,7 @@ jobs:
       - name: checkout
         uses: actions/checkout@v4
       - name: Setup mdBook
-        uses: peaceiris/actions-mdbook@v1
+        uses: peaceiris/actions-mdbook@v2
       - name: Build mdBook
         run: |
           mdbook build