Updating applinks url

Author: spekulatius

README.md

@@ -559,7 +559,7 @@ Minimum required xml markup for `browserconfig.xml`:
 <meta property="al:web:url" content="https://applinks.org/documentation">
 ```
 
-- 📖 [App Links](https://applinks.org/documentation/)
+- 📖 [App Links](https://developers.facebook.com/docs/applinks)
 
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