update to ei-rnn doc

Author: Alexander Ororbia

docs/images/museum/ei_rnn/ei_rnn_arch.jpg

@@ -6,6 +6,17 @@ recurrent neural network (EI-RNN) originally proposed in (Song et al., 2016) [1]
 The model code for this exhibit can be found 
 [here](https://github.com/NACLab/ngc-museum/tree/main/exhibits/ei_rnn).
 
+```{eval-rst}
+.. table::
+   :align: center
+
+   +-----------------------------------------------------------------+
+   | .. image:: ../images/museum/ei_rnn/ei_rnn_arch.jpg              |
+   |   :scale: 65%                                                   |
+   |   :align: center                                                |
+   +-----------------------------------------------------------------+
+```
+
 <!-- references -->
 ## References
 <b>[1]</b> Song, H. F., Yang, G. R., & Wang, X. J. Training excitatory-inhibitory recurrent neural networks