Update README.md

Author: taki0112

README.md

@@ -207,6 +207,8 @@ x = squeeze_excitation(x, channels=64, ratio=16, use_bias=True, sn=True, scope='
 x = convolution_block_attention(x, channels=64, ratio=16, use_bias=True, sn=True, scope='convolution_block_attention')
 
 x = global_context_block(x, channels=64, use_bias=True, sn=True, scope='gc_block')
+
+x = srm_block(x, channels=64, use_bias=False, is_training=is_training, scope='srm_block')
 ```
 
 <div align="center">
@@ -237,6 +239,12 @@ x = global_context_block(x, channels=64, use_bias=True, sn=True, scope='gc_block
 
 ---
 
+<div align="center">
+  <img src=./assets/srm.png height='450' width='600>
+</div>
+
+---
+
 ## Normalization
 ```python
 x = batch_norm(x, is_training=is_training, scope='batch_norm')