feat: add possessive apostrophe-s to English extras - #10

Bugbot Analysis Progress (32s elapsed)

✅ Gathered PR context (3s)
✅ Completed bug detection (28s)
✅ Posted analysis results (2s)

Final Result: Bugbot completed review - no issues found! ✅

Request ID: serverGenReqId_63055980-96ef-4af6-af7f-32cbe9ab7eed