Diagram not generated per specified mermaid-format in gfm format

From Quarto Authoring Diagrams discussion of valid values for mermaid-format I get the suggested yml header below specifying use of javascript, but the output of rendering has an html relative reference to a png file instead of the mermaid code. This is a problem when saving a README.md to an Azure DevOps repo, which rewrites the url in markdown image specifications in the output Markdown file but not in html relative reference currently generated regardless of mermaid-format setting.

 ---
 title: "Test gfm and mermaid"
 format:
     gfm:
         mermaid-format: js
 ---
 
 ## Test Readme
 
 From [Quarto Authoring Diagrams](https://quarto.org/docs/authoring/diagrams.html) discussion of valid values for `mermaid-format` I get the suggested yml header above specifying javascript, but the output of rendering has an html 
relative reference to a png file instead of the mermaid code. This is a problem when saving a README.md to an Azure DevOps repo, which rewrites the url in markdown image specifications in the output Markdown file but not in html relative 
 reference currently generated regardless of `mermaid-format` setting.
 
 ```{dot}
 digraph sample {
     A -> B
 }

yields

```{asis}
<div>
<figure class=''>
<div>
<img src="TestMermaidFormat_files\figure-commonmark\dot-figure-1.png" style="width:7in;height:5in" />
</div>
</figure>
</div>

rather than straight mermaid code.

I have to edit the md file to use markdown image reference in order to get Azure readme.md to display the image. I think either emitting javascript as the documentation indicates or writing out the link in markdown instead of html should make the image show up inline in the Azure-repo-rendered README.md.

Quarto version 1.4.554.
Windows 10 version 22H2