undo typos in README

Author: forrestbao

README.md

@@ -3,7 +3,7 @@
 Codepod provides the interactive coding experience popularized by Jupyter, but
 with scalability and production-readiness. Users can still incrementally build
 up code by trying out a small code snippet each time. But they would not be
-overwhelmed by the great number of code snippets as the projects grow.k
+overwhelmed by the great number of code snippets as the projects grow.
 
 <div align="center"><h2>Feel free to
   visit <a href="https://codepod.io" target="_blank">our homepage</a>,