Fix by @stof: Forgot RC as a minimum-stability flag. #r1101718

doc/04-schema.md

@@ -481,7 +481,7 @@ your project dependencies. Specific changes to the stability requirements of
 a given package can be done in `require` or `require-dev` (see
 [package links](#package-links)).
 
-Available options are `dev`, `alpha`, `beta`, and `stable`.
+Available options are `dev`, `alpha`, `beta`, `RC`, and `stable`.
 
 ### repositories <span>(root-only)</span>