Update Readme.md

Author: purvasingh96

Chapter-wise notes/Readme.md

@@ -10,3 +10,8 @@ Table of Contents
 * [Regularization for Deep Learning](https://github.com/purvasingh96/Deep-learning-with-neural-networks/blob/master/Notes/Ch_6_Regularization_for_Deep_Learning/Readme.md)
 * [Optimization for Training Deep Models](https://github.com/purvasingh96/Deep-learning-with-neural-networks/blob/master/Notes/Ch_7_Optimization_for_training_deep_models/Readme.md)
 * [Convolution Neural Networks](https://github.com/purvasingh96/Deep-learning-with-neural-networks/blob/master/Notes/Ch_8_Convolutional_Neural_Networks/Readme.md)
+* [Recurrent Neural Networks](https://github.com/purvasingh96/Deep-learning-with-neural-networks/tree/master/Chapter-wise%20notes/Ch_9_Recurrent_Neural_Networks)
+  * [Modern RNNs](https://github.com/purvasingh96/Deep-learning-with-neural-networks/tree/master/Chapter-wise%20notes/Ch_9_Recurrent_Neural_Networks)
+   * [LSTMs](https://github.com/purvasingh96/Deep-learning-with-neural-networks/blob/master/Chapter-wise%20notes/Ch_9_Recurrent_Neural_Networks/LSTM.md)
+   * [Encoder Decoder Architecture]
+