Subscript rendering in graph broken in Safari

The provided context highlights a resolution concerning an issue previously identified within the mermaid-js project. The issue in question, documented under #5339 on GitHub, has been confirmed as resolved. Furthermore, it's noted that this particular fix has been checked against the development branch to ensure that the resolution is not duplicated or pending implementation there. This action underscores an effort towards maintaining code integrity and ensuring that issues are promptly addressed, contributing to the overall health and reliability of the mermaid-js project.