Add link to RFCs repository

docs/README.md

@@ -141,6 +141,13 @@ A guide on how to open issues and contribute code to the Crystal project.
   </div>
   <div class="card" markdown="1">
 
+### [Requests for Comments]([https://crystal-lang.org/community/governance.html](https://github.com/crystal-lang/rfcs/pulls?q=is%3Apr+is%3Aopen+sort%3Aupdated-desc))
+
+The RFC process provides a consistent and controlled path to discuss substantial changes in the Crystal project and form a community consensus.
+
+  </div>
+  <div class="card" markdown="1">
+
 ### [Code of Conduct](https://github.com/crystal-lang/crystal/blob/master/CODE_OF_CONDUCT.md)
 
 Our standards and expectations about working together as a community.