docs(README): Fix module overview image

Also remove unused UI5 logo image

Author: matz3

README.md

@@ -39,7 +39,7 @@ UI5 CLI consists of multiple packages managed within this monorepo:
 - **packages/logger**: Internal logging module
 
 **Usage Overview** *(arrows indicate dependencies)*
-![Module Overview](./docs/images/Module_overview.png)
+![Module Overview](./packages/documentation/docs/images/Module_overview.png)
 
 ## Contributing