Answer for Basic Blocks - Search is not rendered as JSON

[gabriel-ns]

Describe the content problem

The JSON code in the activity answer for the Basic Blocks course, section Search, is rendered as a markdown text instead of a JSON code.

This is happening for both english and portuguese versions.

How do you think it should be?

Fix the markdown to render the final code as JSON only

Screenshots

[fabianaferreira]

Fixed on #216. Thank you so much for your contribution, @gabriel-ns