API docs Request Body Schema overflows

### Describe what's missing in our docs

It's hard to read the "multiline description" for the Request Body schema

It gets a bit easier to read when you make the page narrower as it puts the response below rather than side by side, but still overflows.

Start by reproducing the Request Body schema page shown in the issue at both wide and narrow viewport sizes, then locate the documentation component that renders its multiline description. Done means the description remains readable and no longer overflows or causes the layout to break at the reported widths.

Written by the indexing model from the issue text.