collection_checklist: fix formatting (#154)

Co-authored-by: Andrew Klychkov <[email protected]>

collection_checklist.md

@@ -15,7 +15,7 @@ Every comment should say whether the reviewer expects it to be addressed, or whe
 - [ ] follows licensing rules
 - [ ] follows the [Ansible documentation standards](https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_documenting.html) and the [style guide](https://docs.ansible.com/ansible/devel/dev_guide/style_guide/index.html#style-guide)
 - [ ] follows [development conventions](https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_best_practices.html)
-- [ ] Only uses allowed plugin types in the `plugins/` directory.
+- [ ] only uses allowed plugin types in the `plugins/` directory
 - [ ] has `README.md`
 - [ ] documentation, examples, and return use FQCNs for `M(..)`, examples, and `seealso` subsections
 - [ ] modules (or plugins) from ansible-base use `ansible.builtin.` as a FQCN prefix