fix(docs): Update README.md with ofact logo

Signed-off-by: Adrian Freiter <adrian.freiter@isst.fraunhofer.de>

Author: adfreiter

README.md

@@ -3,7 +3,7 @@
 
 <div align="center">
 
-   <img src="docs/assets/imgs/OFacT_Logo.png" width="1395" height="679" />
+   <img src="docs/assets/imgs/ofact-logo" width="1395" height="679" />
    <h3>Open Factory Twin</h3> 
    <h4>Open source Digital Twin Framework for Production and Logistics</h4>