Changing logo in README and removing old logo (pandas-dev#29215)

Author: datapythonista

README.md

@@ -1,5 +1,5 @@
 <div align="center">
-  <img src="https://github.com/pandas-dev/pandas/blob/master/doc/logo/pandas_logo.png"><br>
+  <img src="https://dev.pandas.io/static/img/pandas.svg"><br>
 </div>
 
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