To-Dos have gray text color if the text they refer to is not a paragraph

Summary

When the short summary text of a To-Do is not a paragraph <p>, but e.g. a list <ul>/<ol>, the text color is gray ##7f8fa4 instead of the correct black #2e2e2e.

In this example, the comment it refers to starts with a list instead of usual text https://gitlab.com/gl-retrospectives/ux-retrospectives/-/issues/24#note_368820709.

/cc @hollyreynolds