Fixed sentence to be easier to read (#2251)

Fixed a sentence that accidentally used the word "only" twice.

Author: MrFrawsty

docs/versioned_docs/version-v111/intro.md

@@ -84,7 +84,7 @@ There is no need to set the `Content-Type` or add the `DataFormat` parameter to
 
 RestSharp will also handle both XML and JSON responses and perform all necessary deserialization tasks, depending on the server response type. Therefore, you only need to add the `Accept` header if you want to deserialize the response manually.
 
-For example, only you'd only need these lines to make a request with JSON body:
+For example, you'd only need these lines to make a request with JSON body:
 
 ```csharp
 var request = new RestRequest("address/update").AddJsonBody(updatedAddress);