Update galaxy.rst (#19003)

Converterd / fixed MarkDown URL to reStructuredText.

docsite/rst/galaxy.rst

@@ -209,7 +209,7 @@ Container Enabled
 
 If you are creating a Container Enabled role, use the *--container-enabled* option. This will create the same directory structure as above, but populate it
 with default files appropriate for a Container Enabled role. For instance, the README.md has a slightly different structure, the *.travis.yml* file tests
-the role using [Ansible Container](https://github.com/ansible/ansible-container), and the meta directory includes a *container.yml* file.
+the role using `Ansible Container <https://github.com/ansible/ansible-container>`_, and the meta directory includes a *container.yml* file.
 
 Search for roles
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