Update index.md (#101)

Fix broken links in Gateway docs at https://developers.cloudflare.com/gateway/connecting-to-gateway/without-client/DNS

Author: ptzimmerman

products/gateway/src/content/connecting-to-gateway/without-client/DNS/index.md

@@ -6,7 +6,7 @@ order: 0
 
 Cloudflare Gateway supports a variety of client configurations and operating systems as well as DNS over HTTPS.
 
-- [Browser Setup](/getting-started/configuring-clients/browser)
-- [Mac Setup](/getting-started/configuring-clients/mac)
-- [Windows Setup](/getting-started/configuring-clients/windows)
-- [Linux Setup](/getting-started/configuring-clients/linux)
+- [Browser Setup](/connecting-to-gateway/without-client/DNS/browser)
+- [Mac Setup](/connecting-to-gateway/without-client/DNS/mac)
+- [Windows Setup](/connecting-to-gateway/without-client/DNS/windows)
+- [Linux Setup](/connecting-to-gateway/without-client/DNS/linux)