Fix the README files.

[JamieBort]

Make them uniform.

Refer to the Trello card(s) that have already been created for this purpose; not necessarily for this repo specivically.

See https://github.com/JamieBort/LearningDirectory/blob/master/Meta/templates/readme_templates/learning_directory_readme_template.md

See Naming Conventions in this Repo...

Also, update the template(s) such as https://github.com/JamieBort/LearningDirectory/blob/master/Meta/templates/readme_templates/learning_directory_readme_template.md

See Make them uniform. At the very least, make the Learning Directory READMEs uniform. in https://trello.com/c/gZJQgnvv/360-update-github

To decide:

this:

DataVisualization/

or this:

Data Visualization/

or this:

Data_Visualization/

this:

DataVisualization

or this:

Data Visualization

or this:

Data_Visualization

Possibly related: #247

Possibly related: https://github.com/JamieBort/Digital-Knowledge-Base/blob/main/journals/2024_08_06.md#later-create-a-keyboard-shortcut-for-readmemd-files-that-are-used-in-each-sub-directory-of-the-professional-development-learning-directory-66b27b23-e610-4892-8bca-702431926e9d-repo