Fix wrong path of CodingStyle.md (#134)

Signed-off-by: Lehua Ding <[email protected]>

README.md

@@ -89,8 +89,7 @@ section for areas of needed contributions.  If there is no Assignee,
 the work isn't being done!
 
 When developing on Olympia, please adhere to the documented [Coding
-Style
-Guidelines](https://github.com/riscv-software-src/riscv-perf-model/blob/knutel/coding_style_guidelines/CodingStyle.md).
+Style Guidelines](./CodingStyle.md).
 
 ## Example Usage