✏️ Fix external links typo/link (#1702)

docs/en/docs/external-links.md

@@ -7,7 +7,7 @@ There are many posts, articles, tools, and projects, related to **FastAPI**.
 Here's an incomplete list of some of them.
 
 !!! tip
-    If you have an article, project, tool, or anything related to **FastAPI** that is not yet listed here, create a <a href="https://github.com/tiangolo/fastapi/edit/master/docs/en/data/external-links.yml" class="external-link" target="_blank">Pull Request adding it</a>.
+    If you have an article, project, tool, or anything related to **FastAPI** that is not yet listed here, create a <a href="https://github.com/tiangolo/fastapi/edit/master/docs/en/data/external_links.yml" class="external-link" target="_blank">Pull Request adding it</a>.
 
 ## Articles