added a syntax for highlighting text

[manvi2912]

Description

Include a summary of what type of changes were made or which issues were fixed

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• [ ] This change requires a documentation update

Checklist:

• [x] I have performed a self-review of my changes
• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings