Update readme

Author: kracekumar

README.md

@@ -137,10 +137,11 @@ $poetry run python cli.py summary
 
 ### How to contribute?
 
-- If you feel, some examples will make a great learning material add a new file in the format `1xx-<easy|medum|hard>-filename.py` and send a PR.
+- If you feel, some examples will make a great learning material, add a new file in the format `1xx-<easy|medum|hard>-filename.py` and send a PR.
 - If you feel some of the koan file is missing enough links or not well-defined please send a PR or raise an issue.
+- If you feel some of the concepts needs a better examples or missing, open a PR or create an issue.
 
 ### To Support
 
-- [ ] Add async koans
+- [ ] Add async example koans
 - [ ] Add third party annotation koans like django, DRF in separate sub-directory in `koans/`.