Update README.md

README.md

@@ -93,7 +93,7 @@ TensorFlow | 4s | 25s | 165s
                     
 ## Frequently Asked Questions
 
-- **Q: ** How to get reward image from observation ?
+- __Q:__  How to get reward image from observation ?
     **A: ** Observation image has 2 channels. First channel is obstacle image (0: free, 1: obstacle). Second channel is goal image (0: free, 10: goal). For example, in 8x8 grid world, the shape of an input tensor with batch size 128 is [128, 2, 8, 8]. Then it is fed into a convolutional layer with [3, 3] filter and 150 feature maps, followed by another convolutional layer with [3, 3] filter and 1 feature map. The shape of the output tensor is [128, 1, 8, 8]. This is the reward image. 
 
 - **Q: ** What is exactly transition model, and how to obtain value image by VI-module from reward image ?