[v1-rest] Increase font size of "important" information

[Carolyn Au]

Especially since it's important, can we increase the size to at least match the rest of the body text?

Current:

Suggestion:

css for the icon:

    background: var(--dc-red-lite);
    color: white;
    padding-right: 0;
    margin-right: 0.5em;

and removed font-size: 0.8rem on the containing div

This applies to all div's with class alert (e.g. API key).

[Carolyn Au]

This applies to the example requests and responses too (