Mermaid Diagrams Not Correctly Rendering Inline Markdown Formatting

[ranggakd]

📝 Provide detailed reproduction steps (if any)

1. Create a new markdown file or open an existing one in your repository.
2. Add the following Mermaid code block:

   ```mermaid
   %%{init: {"flowchart": {"htmlLabels": false}} }%%
   flowchart LR
       markdown["`This **is** _Markdown_`"]
       newLines["`Line1
       Line 2
       Line 3`"]
       markdown --> newLines

3. Commit and push the changes to the repository.
4. Open the markdown file in the GitHub web interface.

✔️ Expected result

The Mermaid diagram should be correctly rendered with the inline markdown formatting inside the nodes.

❌ Actual result

The Mermaid diagram is not correctly rendered when using inline markdown formatting. The markdown syntax inside the nodes is displayed as plain text.

%%{init: {"flowchart": {"htmlLabels": false}} }%%
flowchart LR
    markdown["`This **is** _Markdown_`"]
    newLines["`Line1
    Line 2
    Line 3`"]
    markdown --> newLines

❓ Possible Solution

There may be an issue with how GitHub's markdown renderer handles inline markdowns inside Mermaid diagrams. A possible solution could be to update the renderer to parse and display the inline markdown inside Mermaid diagrams correctly.

📃 Other details

• Browser: Microsoft Edge - Version 119.0.2151.44 (Official build) (64-bit)