Update README.md

Author: erdogant

README.md

@@ -26,6 +26,10 @@
 Because probabilistic graphical models can be difficult to use, ``Bnlearn`` contains the most-wanted pipelines. Navigate to [API documentations](https://erdogant.github.io/bnlearn/) for more detailed information. **⭐️ Star it if you like it ⭐️**
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+### Star history
+
+[![Star History Chart](https://api.star-history.com/svg?repos=erdogant/bnlearn&type=Date)](https://www.star-history.com/#erdogant/bnlearn&Date)
+
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 ### Key Pipelines