Update and rename README to README.md

lee-shun · web-flow · commit 0d9977f750da · 2022-10-20T15:43:48.000-04:00
diff --git a/README.md b/README.md
@@ -1,5 +1,7 @@
 # `RGB-D` camera dense mapping based on `ORB_SLAM2`
 
+[chinese version](./README_CN.md)
+
 ## Preparation before starting
 
 ### Confirm the build environment
