Add styling for blockquote paragraphs

The blockquote paragraphs are not being styled currently, they look like normal text.

It would be nice if they look like quotes.

For example the note at https://support.torproject.org/rpm/ (second paragraph) is a blockquote

added Bug label

Hello! I'm an outreachy applicant-can I work on this?

just reviewed this PR https://github.com/torproject/lego/pull/15

Updated! https://github.com/torproject/lego/pull/15

added Icebox UX labels

mentioned in issue #31 (closed)

maybe we could install this lektor plugin? It gives pygments styling to code texts:

https://www.getlektor.com/plugins/lektor-markdown-highlighter/

added First Contribution label