Update README

Signed-off-by: shiyu22 <shiyu.chen@zilliz.com>

README.md

@@ -27,25 +27,25 @@ Load an image from path './test.png'.
 import towhee
 
 towhee.glob('./test.png') \
-      .image_decode.cv2() \
+      .image_decode() \
       .img2img_translation.animegan(model_name = 'hayao') \
       .show()
 ```
 
 <img src="./results1.png" height="150px"/>
 
-*Write a same pipeline with explicit inputs/outputs name specifications:*
+*Write a pipeline with explicit inputs/outputs name specifications:*
 
 ```python
 import towhee
-
+      
 towhee.glob['path']('./test.png') \
-      .image_decode.cv2['path', 'origin']() \
+      .image_decode['path', 'origin']() \
       .img2img_translation.animegan['origin', 'facepaintv2'](model_name = 'facepaintv2') \
       .img2img_translation.animegan['origin', 'hayao'](model_name = 'hayao') \
       .img2img_translation.animegan['origin', 'paprika'](model_name = 'paprika') \
       .img2img_translation.animegan['origin', 'shinkai'](model_name = 'shinkai') \
-      .select('origin', 'facepaintv2', 'hayao', 'paprika', 'shinkai') \
+      .select['origin', 'facepaintv2', 'hayao', 'paprika', 'shinkai']() \
       .show()
 ```