Update index.rst

Author: tirthajyoti

docs/index.rst

@@ -12,7 +12,7 @@ here <https://www.linkedin.com/in/tirthajyoti-sarkar-2127aa7>`__.
 .. image:: https://miro.medium.com/max/1838/1*92h6Lg1Bu1F9QqoVNrkLdQ.jpeg
    :width: 600px
    :height: 450px
-   :align: "center"
+   :align: center
 
 Requirements
 ==================================================