Welcome to the Make community!
You can use the built-in function replace
to remove the Markdown codefence from your output:
{{ replace(1.result; "/(^```.+\n|\n```$)/g"; emptystring) }}
(paste this into your field and remap the variable)
For more information, see the replace function documentation in the Help Center.
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Investing some effort into the Make Academy will save you lots of time and frustration using Make.