chore: update Storage Manager reference in README

Author: jordanvn

README.md

@@ -42,7 +42,7 @@ Amplify UI is an open-source UI library with cloud-connected components that are
 | In-App Messaging                |    ✅     |        ✅        |             |         |
 | Geo (MapView)                   |    ✅     |                  |             |         |
 | Account Settings                |    ✅     |                  |             |         |
-| Storage (StorageManager)        |    ✅     |                  |             |         |
+| Storage (FileUploader)          |    ✅     |                  |             |         |
 | Liveness (FaceLivenessDetector) |    ✅     |                  |             |         |
 
 | **Primitives**   | **React** | **Angular** | **Vue** |