Update README.md

Author: sinterwong

README.md

@@ -46,4 +46,6 @@ ai-pipe/
 
 - [x] Design and implement native pipeline module
 - [x] Build CI
-- [ ] Support building a pipeline instance with another methods
+- [x] Implement pipeline builder in examples
+- [ ] Support Execution Engine registration mechanism
+- [ ] Implement an engine with a frame-skipping type backpressure mechanism