fix: remove duplicate Performance option from feature_request template

GitHub silently rejects issue form templates with duplicate dropdown options.
The feature_scope dropdown had "Performance" listed twice, causing the entire
template to be hidden from the issue chooser.

Author: efraespada

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -33,7 +33,6 @@ body:
         - Testing
         - Deployment
         - Security
-        - Performance
         - Reliability
         - Usability
         - Other