Update README.md

RISE V2G logo restored

README.md

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-![RISE V2G logo](https://www.v2g-clarity.com/filer/media/1500560160/182/ "RISE V2G logo")
+![RISE V2G logo](https://www.v2g-clarity.com/filer/media/1500556560/182/ "RISE V2G logo")
 
 The open source reference implementation of the Vehicle-2-Grid communication interface ISO 15118