Request vars: when used in body is displayed in red color

[naman-bruno]

I have checked the following:

• I use the newest version of bruno.
• I've searched existing issues and found nothing related to my issue.

Describe the bug

When I add a request variable to the requests json body, the variable is indicated in red. The request is completed successfully with the variable value; nevertheless, the variable's highlight color is incorrect.

Steps to reproduce:

• Create a request and add a request variable
• Use the request variable in body as {{request_var}}
• Send the request and notice {{request_var}} is in red color even when the request goes through

.bru file to reproduce the bug

No response

Screenshots/Live demo link

[helloanoop]

Merged PR #3812