Example site, mermaid flowchart: font-awesome 'car' icon is not displayed

[deining]

Prerequisites

• I have searched for duplicate or closed issues
• I have searched for relatived questions
• I have read documentations

Describe the issue

Post about diagrams

Flow chart (ìndex.md, line 59-68):

{{% text/align-center %}}
{{< mermaid >}}
graph TD
    A[Christmas] -->|Get money| B(Go shopping)
    B --> C{Let me think}
    C -->|One| D[Laptop]
    C -->|Two| E[iPhone]
    C -->|Three| F[fa:fa-car Car]
{{< /mermaid >}}
{{% /text/align-center %}}

Inside the flowchart, the font-awesome icon fa:fa-car is used (line 66), but the icon is not rendered/imported.

Steps to reproduce

Visit https://hbs.razonyang.com/v1/en/posts/diagram/ and have a look at the flow chart given in chapter 3.1.

Expected behavior

The icon car should be rendered correctly.

What operating system(s) are you seeing the problem on?

Windows

What browser(s) are you seeing the problem on?

Firefox

What version of theme are you using?

0b7ce25 (master) feature: add support for GLFM math blocks (#752)

What version of Hugo are you using?

0.105.0

What version of Node.js are you using?

16

What version of Git are you using?

2.38.1