Removed extra space in sample json mention feature

Ammar Zain · Ammar Zain · commit 66fe0948b0af · 2025-11-27T10:59:44.000-04:00
diff --git a/src/test/resources/requests/adaptivecard-mention.json b/src/test/resources/requests/adaptivecard-mention.json
@@ -1,4 +1,3 @@
-
 {
   "type": "message",
   "attachments": [
