fix: broken AsyncAPI contributing guidelines link (asyncapi#4395) (asyncapi#4398)

Co-authored-by: SanidhyaMadheshia <[email protected]>
Co-authored-by: Sambhav Gupta <[email protected]>
Co-authored-by: V Thulisile Sibanda <[email protected]>

Author: 3 people

markdown/docs/community/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](https://github.com/asyncapi/community/blob/master/CONTRIBUTING.md).
 
 The goal is providing docs contributors with the necessary tools and knowledge to: