Update CONTRIBUTING.md

Author: dussab

CONTRIBUTING.md

@@ -51,7 +51,7 @@ PRs to resolve existing issues are greatly appreciated and issues labeled as
 are a great place to start!
 
 ### Pull request process
--All commits must include a Signed-off-by trailer at the end of each commit message to indicate that the contributor agrees to the Developer Certificate of Origin. For additional details, check out the [DCO instructions][dco.md).
+-All commits must include a Signed-off-by trailer at the end of each commit message to indicate that the contributor agrees to the Developer Certificate of Origin. For additional details, check out the [DCO instructions](dco.md).
 
 - Create an issue outlining the fix or feature.
 - Fork the mkp repository to your own GitHub account and clone it locally.