ReStructuredText files have broken syntax highlight for code-blocks in rendered view
### Summary
ReStructuredText files have broken syntax highlight for code-blocks in rendered view
### Steps to reproduce
1. Create *.rst file with code-block and specify language.
2. Open it in and ensure to select "Display rendered file" option.
### Example Project
Here is the project and reproducing file: [link](https://gitlab.com/deniskuplyakov/rst-syntax-highlight-broken/-/blob/main/README.rst?plain=0)
### What is the current *bug* behavior?
No syntax highlighting applied.
### What is the expected *correct* behavior?
Syntax highlighting is applied.
### Output of checks
This bug happens on GitLab.com
issue