ansible-galaxy init does create a sub directory (#52390)

`ansible-galaxy init` creates a directory named `role_name` (in the given example) instead of adding the structure in the current working directory.

Additionally adding a clarification for repository creation as the proper repository root is not described yet.

+label: docsite_pr

docs/docsite/rst/reference_appendices/galaxy.rst

@@ -222,6 +222,7 @@ The above will create the following directory structure in the current working d
 
 ::
 
+   role_name/
        README.md
        .travis.yml
        defaults/
@@ -238,6 +239,8 @@ The above will create the following directory structure in the current working d
        vars/
            main.yml
 
+If you want to create a repository for the role the repository root should be `role_name`.
+
 Force
 =====