GitHub: broken/unthemed mermaid flow chart diagrams

[sunng87]

Is there an existing issue outlining your problem?

• [X] I am using the latest version of the provided userstyle.
• [X] I have searched the existing issues and they do not solve my problem.

What userstyles are you seeing the problem on?

lbl:github

Describe your problem.

Using the latest version github user style, the dotted connection in mermaid flow chart is rendered incorrectly.

Please check: https://github.com/GreptimeTeam/demo-scene/tree/main/nginx-log-metrics

Attach screenshots.

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

Firefox v130

Any additional comments?

No response