Multi-line admonition title's icon aligns with last line

[stevepiercy]

When using an admonition title that soft wraps across multiple lines, its icon aligns with the last line of the admonition.

The following example uses sphinx-togglebutton, but it's not necessary to reproduce the issue. See also the screenshot.

```{admonition} Warning! This feature is experimental and only applies to registering routes for React Router 7 applications. Click to accept the risks and read details.
:class: warning, toggle

Uh-oh, now you're in trouble!
```

To fix this, I added a one-line style to my child theme, plone-sphinx-theme.

https://github.com/plone/plone-sphinx-theme/blob/f30931569351be713c57eaa73dac3cb4f4478e8a/src/plone_sphinx_theme/assets/styles/content/_admonitions.scss#L14

      top: 0.5rem;

And here's the result.

If you like, I can submit a pull request with this change. Please let me know. Thank you!

[trallard]

Hi @stevepiercy, thanks for flagging this.
If you are up to open a PR to fix this alignment issue we would appreciate it very much 🙏🏽