Bump withastro/action from 2 to 3 (#119)

Author: dependabot[bot]

.github/workflows/deploy.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Checkout your repository using git
         uses: actions/checkout@v4
       - name: Install, build, and upload your site
-        uses: withastro/action@v2
+        uses: withastro/action@v3
         with:
           path: docs
           node-version: 20