Move expo samples to a service account.

Summary:
This is a nit. Just moving this expo sample to a service account
which is co-owned by Meta and Expo.

Changelog:
[Internal] [Changed] - Move expo samples to a service account.

Reviewed By: cipolleschi

Differential Revision: D41533073

fbshipit-source-id: 4745bb35160c401ebb9ce03325bda64726f122dc

README.md

@@ -93,7 +93,7 @@ Follow the [Getting Started guide](https://reactnative.dev/docs/getting-started)
 - [Creating a New Application][new-app]
 - [Adding React Native to an Existing Application][existing]
 
-[hello-world]: https://snack.expo.dev/@hramos/hello,-world!
+[hello-world]: https://snack.expo.dev/@samples/hello-world
 [new-app]: https://reactnative.dev/docs/getting-started
 [existing]: https://reactnative.dev/docs/integration-with-existing-apps