[VS Code] Color theme in the chat doesn't fully match with editor

Checklist

• I'm using the latest version of the extension (see the latest version in the right column of this page)
  • Extension version: 5.11.0
• I'm using the latest VS Code version (find the latest version here)
  • VS Code version: 1.93.1
• I'm using a supported version of GitLab (see README for the supported version)
  • GitLab version: happens on gitlab.com

Summary

Chat colors don't match the editor most of the time

Steps to reproduce

Ask the chat to refactor something or provide the code in the same language as a current file

What is the current bug behavior?

Some code highlight is different from the code in the file. Something not highlighted at all

What is the expected correct behavior?

Colors should match

Relevant logs and/or screenshots

Do not match	Not highlighted for tests

Possible fixes