Contents shortcode does not work on code-cell div with `knitr`

Bug description

It appears {{< contents ID >}} cannot move code-cells with an ID when the engine is set to knitr.

I'm not sure what the limitation actually is:

Currently, {{< contents >}} itself does not work inside code elements. We may lift that limitation in the future.

Steps to reproduce

---
title: "Quarto Playground"
format: html
engine: jupyter
---

## Section 1

```{python}
#| label: my-figure
import matplotlib.pyplot as plt
plt.plot([1,2,3])
```

## Section 2

{{< contents my-figure >}}

---
title: "Quarto Playground"
format: html
engine: knitr
---

## Section 1

```{r}
#| label: my-figure
plot(1:10)
```

## Section 2

{{< contents my-figure >}}

---
title: "Quarto Playground"
format: html
engine: jupyter
---

## Section 1

```{python}
#| label: fig-figure
import matplotlib.pyplot as plt
plt.plot([1,2,3])
```

## Section 2

{{< contents fig-figure >}}

---
title: "Quarto Playground"
format: html
engine: knitr
---

## Section 1

```{r}
#| label: fig-figure
plot(1:10)
```

## Section 2

{{< contents fig-figure >}}

Expected behavior

Content is moved without warning.

Actual behavior

WARNING (/Users/mcanouil/Projects/quarto/quarto-cli/src/resources/filters/./quarto-pre/contentsshortcode.lua:79) [Malformed document] Found `contents` shortcode without a corresponding div with id: my-figure.
This might happen because the shortcode is used in div context, while the id corresponds to a span.
Removing from document.

WARNING (/Users/mcanouil/Projects/quarto/quarto-cli/src/resources/filters/./quarto-pre/contentsshortcode.lua:79) [Malformed document] Found `contents` shortcode without a corresponding div with id: fig-figure.
This might happen because the shortcode is used in div context, while the id corresponds to a span.
Removing from document.

Your environment

No response

Quarto check output

Quarto 99.9.9
[✓] Checking environment information...
      Quarto cache location: /Users/mcanouil/Library/Caches/quarto
[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.4.0: OK
      Dart Sass version 1.70.0: OK
      Deno version 1.46.3: OK
      Typst version 0.11.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 99.9.9
      commit: b822c3f5cc2b7dd57238bed2bcbbd2c2ed7688b8
      Path: /Users/mcanouil/Projects/quarto/quarto-cli/package/dist/bin

[✓] Checking tools....................OK
      TinyTeX: v2025.02
      Chromium: (not installed)

[✓] Checking LaTeX....................OK
      Using: TinyTex
      Path: /Users/mcanouil/Library/TinyTeX/bin/universal-darwin
      Version: 2024

[✓] Checking Chrome Headless....................OK
      Using: Chrome found on system
      Path: /Applications/Brave Browser.app/Contents/MacOS/Brave Browser
      Source: QUARTO_CHROMIUM

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

[✓] Checking Python 3 installation....OK
      Version: 3.13.2
      Path: /Users/mcanouil/Projects/quarto/quarto-playground/.venv/bin/python
      Jupyter: 5.7.2
      Kernels: julia-1.11, python3

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

(|) Checking R installation...........ℹ R version 4.4.2 (2024-10-31)
! Config '~/.Rprofile' was loaded!
[✓] Checking R installation...........OK
      Version: 4.4.2
      Path: /Library/Frameworks/R.framework/Resources
      LibPaths:
        - /Users/mcanouil/Projects/quarto/quarto-playground/renv/library/macos/R-4.4/aarch64-apple-darwin20
        - /Users/mcanouil/Library/Caches/org.R-project.R/R/renv/sandbox/macos/R-4.4/aarch64-apple-darwin20/f7156815
      knitr: 1.46
      rmarkdown: 2.29

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