Versioned docs: better warnings + fix some typos

[tigerros]

Instead of using > Message, we should use <div class="warning">Message</div>. Comparison:

[marc2332]

isn't there a way to do it with Markdown? the warning thing

[tigerros]

No, I don't think so. I looked at the commonmark reference and they do have a blockquote, but rustdoc just styles it like that. The div is what rustdoc recommends instead (https://doc.rust-lang.org/rustdoc/how-to-write-documentation.html#adding-a-warning-block).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e37f663) 52.63% compared to head (86f032b) 52.63%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #431   +/-   ##
=======================================
  Coverage   52.63%   52.63%           
=======================================
  Files         146      146           
  Lines       12808    12808           
=======================================
  Hits         6742     6742           
  Misses       6066     6066           

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[marc2332]

ah nice 👀