ci: update CNAME file for GitHub Pages deployment

Author: shenghuo2

.github/workflows/astro.yml

@@ -26,7 +26,7 @@ jobs:
         run: npm run build
 
       - name: Create CNAME file
-        run: echo 'n0wayback.shenghuo2.top' > ./dist/CNAME
+        run: echo 'n0wayback.net' > ./dist/CNAME
 
       - name: Deploy to GitHub Pages
         uses: peaceiris/actions-gh-pages@v3