Modify rule S5280: Update quickfix status

## Review

A dedicated reviewer checked the rule description successfully for:

- [ ] logical errors and incorrect information
- [ ] information gaps and missing content
- [ ] text style and tone
- [ ] PR summary and labels follow [the
guidelines](https://github.com/SonarSource/rspec/#to-modify-an-existing-rule)

rules/S5280/cfamily/metadata.json

@@ -31,5 +31,5 @@
   "defaultQualityProfiles": [
     "Sonar way"
   ],
-  "quickfix": "unknown"
+  "quickfix": "infeasible"
 }