Update README.md

Author: jason-fox

README.md

@@ -30,8 +30,8 @@ git checkout NGSI-v2
 ./services start
 ```
 
-| [![NGSI v2](https://img.shields.io/badge/NGSI-v2-5dc0cf.svg)](https://fiware-ges.github.io/orion/api/v2/stable/) | :books: [Documentation](https://github.com/FIWARE/tutorials.Media-Streams/tree/NGSI-v2) |
-| --- | --- |
+| [![NGSI v2](https://img.shields.io/badge/NGSI-v2-5dc0cf.svg)](https://fiware-ges.github.io/orion/api/v2/stable/) | :books: [Documentation](https://github.com/FIWARE/tutorials.Media-Streams/tree/NGSI-v2) |  ![](https://img.shields.io/github/last-commit/fiware/tutorials.Media-Streams/NGSI-v2)
+| --- | --- | ---
 
 
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