Example in README has the wrong import for `GraphServiceClient`

[rameshvenk]

Describe the bug

In section 2.3, the README has
from msgraph import GraphServiceClient
whereas
from msgraph.graph_service_client import GraphServiceClient
seems to work

Expected behavior

Please clarify or fix README

How to reproduce

install msgraph sdk
In a python repl
import msgraph
dir(msgraph) # this will show no GraphServiceClient
dir(msgraph.graph_service_client) will show GraphServiceClient

SDK Version

1.61.0

Latest version known to work for scenario above?

No response

Known Workarounds

use from msgraph.graph_service_client import GraphServiceClient

Debug output

Click to expand log

```

</details>


### Configuration

_No response_

### Other information

_No response_