Add missing end codeblock

Author: blopker

.github/ISSUE_TEMPLATE/feature_request.md

@@ -22,6 +22,7 @@ assignees: ''
 <!-- If applicable, provide examples of how this feature might work or how it works in other tools -->
 ```
 <!-- Code examples, mock screenshots, etc. -->
+```
 
 **Additional Context**
 <!-- Add any other context, screenshots, or references about the feature request here -->