Update README.md

Author: sudharsan13296

05. Improvements to the RNN/README.md

@@ -3,12 +3,7 @@
 # [Chapter 5. Improvements to the RNN](#)
 
 * 5.1. LSTM to the Rescue
-* 5.2. Understanding the LSTM cell
-* 5.2.1. Forget Gate
-* 5.2.2. Input Gate
-* 5.2.3. Output Gate
-* 5.2.4. Updating the cell state
-* 5.2.5. Updating the hidden state
+* [5.2. Understanding the LSTM cell] (https://github.com/sudharsan13296/Hands-On-Deep-Learning-Algorithms-with-Python/blob/master/05.%20Improvements%20to%20the%20RNN/5.02%20Understanding%20the%20LSTM%20cell.ipynb)
 * 5.3. Forward propagation in LSTM
 * 5.4. Backpropagation in LSTM
 * 5.5. Deriving backpropagation of LSTM Step by step
@@ -31,7 +26,7 @@
 * 5.10.2.2. Gradients with respect to W
 * 5.10.2.3. Gradients with respect to U
 * 5.11. Implementing GRU cell in Tensorflow
-* 5.12. BiDirectional RNN
+* [5.12. BiDirectional RNN](https://github.com/sudharsan13296/Hands-On-Deep-Learning-Algorithms-with-Python/blob/master/05.%20Improvements%20to%20the%20RNN/5.12%20BiDirectional%20RNN.ipynb)
 * 5.13. Going Deep with Deep RNN 
 * 5.14. Language Translation Seq2seq models
 * 5.14.1. Encoder