Merge pull request #136 from mizoR/fix-broken-link

Fix broken link to CONTRIBUTING

Author: mizoR

README.md

@@ -97,7 +97,7 @@ This project respects semantic versioning.
 See https://semver.org/
 
 ## Contributing
-Please check [CONTRIBUTING](contributing.md) before making a contribution.
+Please check [CONTRIBUTING](CONTRIBUTING.md) before making a contribution.
 
 ## License
 ```