### Bug description

Right now `giscus` uses a light theme by default even when a dark theme is toggled. 

<img width="1045" alt="image" src="https://user-images.githubusercontent.com/1813121/224907905-db32d0e6-0f75-4d84-ba55-bc40df8f6c03.png">


### Checklist

- [ ] Please include a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
- [ ] Please [format your issue](https://quarto.org/bug-reports.html#formatting-make-githubs-markdown-work-for-us) so it is easier for us to read the bug report.
- [ ] Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [ ] Please document the operating system you're running. If on Linux, please provide the specific distribution.
- [ ] Please provide the output of `quarto check` so we know which version of quarto and its dependencies you're running.
allenmanning
2023-03-14T05:48:26Z
kdheepak
bug giscus
v1.4
closed
When using a dark theme, giscus should use a dark theme as well.
https://github.com/quarto-dev/quarto-cli/issues/4820