copy update

Author: Andrew-Paystack

src/doc/payments/preauthorization/events/preauthorization-capture-success.json

@@ -36,7 +36,7 @@
     "message": "Approved",
     "id": 3099,
     "merchant_id": 412922,
-    "merchant_name": "StarterZA",
+    "merchant_name": "Test Business",
     "metadata": null,
     "reference": "atyntuup5bec03e",
     "status": "captured",

src/doc/payments/preauthorization/events/preauthorization-release-failed.json

@@ -36,7 +36,7 @@
     "message": "Release failed",
     "id": 3118,
     "merchant_id": 412922,
-    "merchant_name": "StarterZA",
+    "merchant_name": "Test Business",
     "metadata": null,
     "reference": "h15lgtld6kqlkcm",
     "status": "release_failed",