update collections/requirements.yml

tmp/ansible_collections/redhat_cop/tower_configuration/STANDARDS.md

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+## Contributor's Guidelines
+
+- All YAML files named with '.yml' extension
+- Use spaces around jinja variables. {{ var }} over {{var}}
+- Variables that are internal to the role should be lowercase
+- Keep roles self contained - Roles should avoid including tasks from other roles when possible
+- Plays should do nothing more than include a list of roles except where pre_tasks and post_tasks are required when possible
+- Separators - Use underscores (e.g. my_role my_playbook) not dashes (my-role)
+- Paths - When defining paths, do not include trailing slashes (e.g. my_path: /foo not my_path: /foo/). When concatenating paths, follow the same convention (e.g. {{ my_path }}/bar not {{ my_path }}bar)
+- Indentation - Use 2 spaces for each indent
+- `vars/` vs `defaults/` - if you have variables that don't need to change or be overridden by user, put those in `vars/` and those that a user would likely override, put those under `defaults/` directory.
+- All playbooks/roles should be focused on compatibility with Ansible Tower