fix(CSS): last elements inside blockquotes do not need bottom margin

[bsmth]

Summary

This PR adds a CSS rule to strip the bottom margin from last elements inside blockquotes.

See:

• https://developer.mozilla.org/en-US/docs/MDN/Writing_guidelines/Writing_style_guide
• https://developer.mozilla.org/en-US/blog/aria-accessibility-html-landmark-roles/

Problem

The styles for blockquotes looks a little wobbly and difficult to read.

Solution

Add a rule like the following:

.main-page-content .section-content blockquote > :last-child {
  margin-bottom: 0;
}

Screenshots

Before

After

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How did you test this change?

Running on localhost.

[LeoMcA]

lgtm!

[bsmth]

Thank you! 🙏🏻