README.md in datadog_api_client-2.9.0 vs README.md in datadog_api_client-2.10.0

@@ -110,10 +110,10 @@
 
 When talking to a different server, like the `eu` instance, change the `server_variables` on your configuration object:
 
 ```ruby
 config = DatadogAPIClient::Configuration.new
-config.server_variables["site"] = "datadoghq.eu"
+config.server_variables[:site] = "datadoghq.eu"
 client = DatadogAPIClient::APIClient.new(config)
 ```
 
 ### Disable compressed payloads