Add Grafana and Mongo requirements in README.md

Author: haohanyang

README.md

@@ -18,6 +18,9 @@ This plugin enables you to query and visualize data from your MongoDB databases
 - **Grafana Alerting Support** Set up alerting rules based on query result
 - **[Legacy Plugin](https://github.com/JamesOsgood/mongodb-grafana) Compatibility:** Easy migrate from the [legacy plugin](https://github.com/JamesOsgood/mongodb-grafana) with support for its query syntax.
 
+## Requirements:
+* Grafana >= 10.4.0
+* MongoDB >= 3.6
 ## Authentication methods
 * No authentication
 * Username/Password authentication
@@ -201,4 +204,4 @@ Provide the collection name and your MongoDB aggregation pipeline in standard JS
  **Note:** Unsupported BSON types are not included in the table and will display as `"[Unsupported type]"`.
 
 ## License
-[Apache-2.0](/LICENSE)
+[Apache-2.0](/LICENSE)