Update mermaid version to 10.6.0

What does this MR do and why?

Update mermaid version to 10.6.0

Changelog: changed

Screenshots or screen recordings

N/A

How to set up and validate locally

1. Checkout this branch and update your local environment
2. Open the editor / write a comment anywhere in your local environment
3. 
4. Post/preview the comment, see that your version should be 10.6.0

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.