Merge branch '6.3' into 6.4

* 6.3:
  Update flex_private_recipes.rst

Author: OskarStark

setup/flex_private_recipes.rst

@@ -224,7 +224,7 @@ computer, and execute the following command:
 
 .. code-block:: terminal
 
-    $ composer config --global --auth gitlab-oauth.gitlab.com [token]
+    $ composer config --global --auth gitlab-token.gitlab.com [token]
 
 Replace ``[token]`` with the value of your Gitlab personal access token.