Fix logo (#174)

Not sure if this is the actual logo. It's at least the logo that Google Images has in its cache for this page.

In any case, the current logo referenced in the README is broken...

Author: strickvl

README.md

@@ -5,7 +5,7 @@
 [![](https://img.shields.io/pypi/v/ydata-synthetic)](https://pypi.org/project/ydata-synthetic/)
 ![](https://img.shields.io/github/license/ydataai/ydata-synthetic)
 
-<p align="center"><img width="200" src="https://ydata-demos.s3.eu-central-1.amazonaws.com/Synthetic+Data_2.png" alt="Synthetic Data Logo"></p>
+<p align="center"><img width="200" src="https://user-images.githubusercontent.com/3348134/177604157-11181f6c-57e5-44b1-8f6c-774edbba5512.png" alt="Synthetic Data Logo"></p>
 
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