fix: fix trailing slashes used in sitemap

Author: stevenle

.changeset/stale-ladybugs-walk.md

@@ -0,0 +1,5 @@
+---
+'@blinkk/root': patch
+---
+
+fix: fix trailing slashes used in sitemap

packages/root/src/render/router.ts

@@ -198,6 +198,10 @@ export function normalizeUrlPath(
   if (!urlPath.startsWith('/')) {
     urlPath = `/${urlPath}`;
   }
+  // Add trailing slash if needed.
+  if (options?.trailingSlash && !urlPath.endsWith('/')) {
+    urlPath = `${urlPath}/`;
+  }
   return urlPath;
 }