fix(seo): stop advertising missing alternate sitemap (#111)

Co-authored-by: dadachann <[email protected]>

robots.txt

@@ -3,4 +3,3 @@ Allow: /
 Allow: /_next/
 
 Sitemap: https://docs.langbot.app/sitemap.xml
-Sitemap: https://docs.langbot.app/sitemap-alternates.xml

tests/seo.test.mjs

@@ -40,7 +40,7 @@ test("custom robots policy is served from the Mintlify project root", async () =
     robots,
     /^Sitemap: https:\/\/docs\.langbot\.app\/sitemap\.xml$/m,
   );
-  assert.match(
+  assert.doesNotMatch(
     robots,
     /^Sitemap: https:\/\/docs\.langbot\.app\/sitemap-alternates\.xml$/m,
   );