fix: exclude /archives from sitemap if it is disabled (#425)

Author: kkomelin

astro.config.ts

@@ -14,7 +14,9 @@ export default defineConfig({
       applyBaseStyles: false,
     }),
     react(),
-    sitemap(),
+    sitemap({
+      filter: page => SITE.showArchives || !page.endsWith("/archives"),
+    }),
   ],
   markdown: {
     remarkPlugins: [