[docs] fix some links to the repositories page

doc/02-libraries.md

@@ -74,7 +74,7 @@ Here are some examples of version branch names:
     1.1.*
 
 > **Note:** When you install a dev version, it will install it from source.
-See [Repositories] for more information.
+See [Repositories](05-repositories) for more information.
 
 ## Lock file
 

doc/04-schema.md

@@ -247,7 +247,7 @@ The following repository types are supported:
   composer whatsoever you can define the package inline using a `package`
   repository. You basically just inline the `composer.json` object.
 
-For more information on any of these, see [Repositories].
+For more information on any of these, see [Repositories](05-repositories).
 
 Example: