Add license note to FastAPI

Author: tiangolo

implementations.md

@@ -117,7 +117,7 @@ Hyper-Schema
     -   [@cloudflare/doca](https://github.com/cloudflare/json-schema-tools/tree/master/workspaces/doca) ([JSON Schema Tools](https://github.com/cloudflare/json-schema-tools)), _draft-04, -06, -07, and Doca extensions_ (UI forthcoming)
 
 -   Python
-    -   [FastAPI](https://github.com/tiangolo/fastapi) is an API framework based on Python 3.6+ types that generates **OpenAPI 3** schemas, including **JSON Schemas** for all the models declared.
+    -   [FastAPI](https://github.com/tiangolo/fastapi) (MIT) is an API framework based on Python 3.6+ types that generates **OpenAPI 3** schemas, including **JSON Schemas** for all the models declared.
 
 #### Link Description Object utilities