📝 Add links to GitHub sponsors 💸 (#1425)

* 📝 Add links to GitHub sponsors

* ✏ Update link to sponsors

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: [tiangolo]

docs/en/docs/help-fastapi.md

@@ -100,6 +100,12 @@ You can <a href="https://github.com/tiangolo/fastapi" class="external-link" targ
 * To fix an existing issue/bug.
 * To add a new feature.
 
+## Sponsor the author
+
+You can also financially support the author (me) through <a href="https://github.com/sponsors/tiangolo" class="external-link" target="_blank">GitHub sponsors</a>.
+
+There you could buy me a coffee ☕️ to say thanks 😄.
+
 ---
 
 Thanks!