Module description is a missing punctuation.

Problem/Motivation

The module description is currently, "Allows Drupal menus to be displayed as a dropdown menu with disclosure buttons"

The sentence should include a period at the end.

Steps to reproduce

1. Install the module.
2. Visit the Extend admin page and look at the Disclosure Menu's description.

Proposed resolution

Add a period to the end of the sentence.

Remaining tasks

1. ❌ Create a merge request.
2. ❌ Test the merge request.
3. ❌ Commit the bug fix to the dev branch.
4. ❌ Enjoy a description with proper punctuation.

User interface changes

Updated module description.

API changes

None.

Data model changes

None.