fix: broken contributing-guidelines link (#2220)

Co-authored-by: Shubham <b4mshubham@gmail.com>
Co-authored-by: V Thulisile Sibanda <66913810+thulieblack@users.noreply.github.com>

Author: shubham220420

docs/000-onboarding/index.md

@@ -6,7 +6,7 @@ weight: 2
 
 The AsyncAPI technical writer onboarding guide teaches new community members how to contribute to our documentation effectively. 
 
-> For a comprehensive understanding of the various ways you can contribute to the AsyncAPI Initiative, please consult the [AsyncAPI contributing guidelines](../../CONTRIBUTING.md).
+> For a comprehensive understanding of the various ways you can contribute to the AsyncAPI Initiative, please consult the [AsyncAPI contributing guidelines](../010-contribution-guidelines)
 
 The goal is providing docs contributors with the necessary tools and knowledge to: