docs: accredit sriram (#1323)

Signed-off-by: David Harris <david.harris@grafana.com>

Author: sympatheticmoose

README.md

@@ -4,6 +4,8 @@ Visualize data from JSON, CSV, XML, GraphQL and HTML endpoints.
 
 [![click here for documentation](https://user-images.githubusercontent.com/153843/189100076-7fe3535d-0bc3-4e4a-b37d-14934ae621db.png)](https://grafana.com/docs/plugins/yesoreyeram-infinity-datasource)
 
+> **Maintenance**: this plugin was created by [Sriram](https://github.com/yesoreyeram) and is now maintained by Grafana Labs. 
+
 ## Documentation
 
 Detailed documentation and examples are available in [plugin website](https://grafana.com/docs/plugins/yesoreyeram-infinity-datasource)