Update withastro/action

Author: jacobdalamb

.github/workflows/check-links.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: Build site
-        uses: withastro/action@v4
+        uses: withastro/action@v5
         with:
           package-manager: pnpm@latest
 

.github/workflows/deploy.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Checkout your repository using git
         uses: actions/checkout@v5
       - name: Install, build, and upload your site
-        uses: withastro/action@v4
+        uses: withastro/action@v5
         with:
           package-manager: pnpm@latest