Add the new logo to the README

README.rst

 |Tests Status| |Coverage| |Gitter|
 
+.. raw:: html
+
+  <div align="center">
+  <img src="./doc/images/aesara_logo_2400.png" alt="logo"></img>
+  </div>
+
+
 |Project Name| is a Python library that allows one to define, optimize, and
 efficiently evaluate mathematical expressions involving multi-dimensional
 arrays.
@@ -119,6 +126,9 @@ operate under the NumFOCUS umbrella, if you want to support them financially,
 consider donating `here <https://numfocus.salsalabs.org/donate-to-pymc3/index.html>`__.
 
 
+Special thanks to `Bram Timmer <http://beside.ca>`__ for the logo.
+
+
 .. |Project Name| replace:: Aesara
 .. |Tests Status| image:: https://github.com/aesara-devs/aesara/workflows/Tests/badge.svg
   :target: https://github.com/aesara-devs/aesara/actions?query=workflow%3ATests