Use repo-specific contributing guide link

Author: mao-sz

README.md

@@ -4,7 +4,7 @@ These JavaScript exercises are intended to complement the JavaScript content on
 
 ## Contributing
 
-If you have a suggestion to improve an exercise, an idea for a new exercise, or notice an issue with an exercise, please feel free to open an issue after thoroughly reading our [contributing guide](https://github.com/TheOdinProject/.github/blob/main/CONTRIBUTING.md).
+If you have a suggestion to improve an exercise, an idea for a new exercise, or notice an issue with an exercise, please feel free to open an issue after thoroughly reading our [contributing guide](https://github.com/TheOdinProject/javascript-exercises/blob/main/CONTRIBUTING.md).
 
 ## How To Use These Exercises