fix: breadcrumb issue with RFC process section in contributing.md (#2…

…4090)

docs/contributing/index.md

@@ -14,6 +14,6 @@ Below you'll find guides on the Gatsby.js community, code of conduct, and how to
 - [Code of Conduct](/contributing/code-of-conduct/): Read about what we expect from everyone participating in Gatsby.js to make it the most friendly and welcoming community.
 - [Gatsby Style Guide](/contributing/gatsby-style-guide/): The art of contributing to Gatsby, a.k.a. the detailed requirements that will make it more likely your contribution is accepted with minimal changes.
 - [How to Contribute](/contributing/how-to-contribute/): How to get the most out of your Gatsby.js contributing experience, including GitHub management tips, setup instructions for docs and code contributions, and more.
-- [RFC process](/contributing/rfc-process): Learn how the Gatsby.js team manages bigger changes, by way of a “Request-for-comment” process on GitHub.
+- [RFC process](/contributing/rfc-process/): Learn how the Gatsby.js team manages bigger changes, by way of a “Request-for-comment” process on GitHub.
 
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