Update astro.yml

Author: Kin9L

.github/workflows/astro.yml

@@ -57,7 +57,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
-          node-version: "18"
+          node-version: "20"
           cache: ${{ steps.detect-package-manager.outputs.manager }}
           cache-dependency-path: ${{ env.BUILD_PATH }}/${{ steps.detect-package-manager.outputs.lockfile }}
       - name: Setup Pages