fix pipeline with upgraded astro

Author: Kyle-Undefined

.github/workflows/deploy.yml

@@ -15,10 +15,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout your repository using git
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install, build, and upload your site
-        uses: withastro/action@v3
+        uses: withastro/action@v6
 
   deploy:
     needs: build