Update 4.federation.md

typpo for "frontend"

Author: danidan95

docs/content/3.middleware/2.guides/4.federation.md

@@ -1,6 +1,6 @@
 # Data Federation
 
-Optimizing server requests through data federation is a common technique used within composable architectures that improves performance and reduces coupling between frotnend and backend API's. This guide shows how to use the `getApiClient` method to retrieve and interact with integrations within the context of another integration to mix them together in one request.
+Optimizing server requests through data federation is a common technique used within composable architectures that improves performance and reduces coupling between frontend and backend API's. This guide shows how to use the `getApiClient` method to retrieve and interact with integrations within the context of another integration to mix them together in one request.
 
 ## Why?