Too hard to read description of selected row when using vertico with opera-light

## What happened?
In vertico with opera-light the description has a similar color of the highlighted background, and so it's not readable:

## What did you expect to happen?
The description to be readable (e.g. darker)

## Steps to reproduce
1. Install the vertico package.
2. Set doom-opera-light theme
3. Run something like counsel-M-x or any function that uses vertico completion.
4. Try navigating up and down the list of selections.

## System Information
+ Emacs version: 27.2
+ Emacs distro: Doom Emacs
+ Operating system: Manjaro 21.1.2 (Arch Linux) GNU with kernel Linux 5.10.61f
+ Installed commit of doom-themes: 9e2680b9188ebd58c490598684bb7545ba01950d
+ Which theme are you using: doom-opera-light

Reproduce the contrast problem in vertico with doom-opera-light, using counsel-M-x or another completion command and navigating the selected rows. Then inspect the doom-opera-light theme definition and its selected-row description styling. Done means the description remains clearly readable against the highlighted background while navigating the list.

Written by the indexing model from the issue text.