`image-width` and `image-height` not working with `open-graph` in some cases

Bug description

Despite specifying image-width and image-height under open-graph, the respective properties do not appear in the resulting HTML in some cases.

Steps to reproduce

Start a new Quarto book project in RStudio and set _quarto.yml to the following:

project:
  type: book

book:
  title: "temp"
  author: "author"
  date: "2025. 02. 03."
  open-graph:
    image: surus.jpg
    image-width: 1200
    image-height: 892
  site-url: https://quarto.org/
  chapters:
    - index.qmd
    - intro.qmd
    - summary.qmd
    - references.qmd

bibliography: references.bib

format:
  html:
    theme:
      - cosmo
      - brand
  pdf:
    documentclass: scrreprt

(The figure is this one.)

I don't know its relevance, but my observation is that the problem goes away if you remove site-url or if you use a PNG file instead of the JPG, but using JPG and specifying site-url at the same time will result in this issue.

Expected behavior

The respective properties (i.e., og:image:height and og:image:width) should appear in the HTML:

<meta property="og:title" content="temp">
<meta property="og:description" content="">
<meta property="og:image" content="https://quarto.org/surus.jpg">
<meta property="og:site_name" content="temp">
<meta property="og:image:height" content="1200">
<meta property="og:image:width" content="892">

Actual behavior

The relevant part of the resulting HTML:

<meta property="og:title" content="temp">
<meta property="og:description" content="">
<meta property="og:image" content="https://quarto.org/surus.jpg">
<meta property="og:site_name" content="temp">

I.e., image-width and image-height does not appear at all.

Your environment

• IDE: RStudio 2024.12.0 Build 467
• OS: Windows 10

Quarto check output

Quarto 1.6.40
[>] Checking environment information...
      Quarto cache location: \AppData\Local\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: 1.6.40
      Path: C:\Program Files\Quarto\bin
      CodePage: 1250

[>] Checking tools....................OK
      TinyTeX: (external install)
      Chromium: (not installed)

[>] Checking LaTeX....................OK
      Using: TinyTex
      Path: \AppData\Roaming\TinyTeX\bin\windows\
      Version: 2024

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

[>] Checking Python 3 installation....OK
      Version: 3.13.1
      Path: C:/Program Files/Python313/python.exe
      Jupyter: 5.7.2
      Kernels: python3

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

[>] Checking R installation...........OK
      Version: 4.4.2
      Path: C:/PROGRA~1/R/R-44~1.2
      LibPaths:
        - /AppData/Local/R/win-library/4.4
        - C:/Program Files/R/R-4.4.2/library
      knitr: 1.49
      rmarkdown: 2.29

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

Reproduce the Quarto book configuration with a JPG image and site-url, then compare the generated HTML with the PNG or no-site-url cases. Trace the open-graph metadata handling and add coverage for the missing image-width and image-height properties; done means the expected Open Graph tags appear in the HTML for the reported configuration.