This PR:
- Adds some line breaks in post content to aid in clarity.
- Makes copy and heading spacing tweaks, as reported via Twitter DM.
- Moves the last updated date to the end of the post, alongside the update author's name.
- Clarifies WCAG's scope, as reported via email.
- Removes uppercase text treatment, as reported via https://github.com/a11yproject/a11yproject.com/issues/1152.
- Addresses CSS linting issues.
- Cachebusts CSS.
Co-authored-by: esjay wayne.elgin@gmail.com