`image-placeholder` on listing page not copied into `_site` folder

Bug description

A listing page with an image-placeholder set in the header yaml does not work, because quarto does not automatically find the image and copy it to _site when rendering. A workaround is to explicitly set resources: "*.png" in the _quarto.yml file, but my expectation is that Quarto should find this resource on its own.

Steps to reproduce

MRE repo (with the workaround resources: "*.png" line commented out) is here

Expected behavior

The image should be copied into _site and the listing page should render properly.

Actual behavior

The image resource is not copied into _site and the place holder image does not display.

Your environment

VS Code, MacOS X Sonoma 14.5

Quarto check output

Quarto 1.5.57
[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.2.0: OK
      Dart Sass version 1.70.0: OK
      Deno version 1.41.0: OK
      Typst version 0.11.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 1.5.57
      Path: /Applications/quarto/bin

[✓] Checking tools....................OK
      TinyTeX: v2023.09
      Chromium: (not installed)

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

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

[✓] Checking Python 3 installation....OK
      Version: 3.10.14 (Conda)
      Path: /usr/local/opt/miniforge3/bin/python
      Jupyter: 5.7.2
      Kernels: py311, sentencet, 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: 1.44
      rmarkdown: 2.25

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