Indented code cells in enumerated lists render with fenced div indicators that shouldn't be visible on the output

Bug description

Including computational plot or table output in enumerated lists requires the code to be indented in the source in order to benefit from automatic numbering. However this results in fenced divs indicators appearing in the output when they shouldn't. See screenshot below.

Steps to reproduce

---
format: html
---

1. Item 1 text.

    ```{r}
    plot(cars)
    ```

1. Item 2 text.

    ```{r}
    cars |> head() |> knitr::kable()
    ```

Expected behavior

Did not expect ::: {.cell} and ::: {.cell-output-display} to be on the output.

Actual behavior

No response

Your environment

• IDE: Version 2023.12.0-daily+278 (2023.12.0-daily+278)
• R: R version 4.3.1
• Mac OS: Ventura 13.5

Quarto check output

Quarto 1.4.489
[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.1.8: OK
      Dart Sass version 1.55.0: OK
      Deno version 1.33.4: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 1.4.489
      Path: /Applications/quarto/bin

[✓] Checking tools....................OK
      TinyTeX: v2023.08
      Chromium: (not installed)

[✓] Checking LaTeX....................OK
      Using: TinyTex
      Path: /Users/mine/Library/TinyTeX/bin/universal-darwin
      Version: 2023

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.9.6
      Path: /Library/Developer/CommandLineTools/usr/bin/python3
      Jupyter: 5.3.0
      Kernels: python3

[✓] Checking Jupyter engine render....OK

[✓] Checking R installation...........OK
      Version: 4.3.1
      Path: /Library/Frameworks/R.framework/Resources
      LibPaths:
        - /Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/library
      knitr: 1.45
      rmarkdown: 2.25

[✓] Checking Knitr engine render......OK