Correct naming for image file instead of custom name

Author: bparth24

credentials/age-verification/credential.json

@@ -11,7 +11,7 @@
   ],
   "issuer": {
     "id": "did:example:12345678910111213",
-    "image": "https://vcplayground.org/examples/age-verification/truage_logo.png",
+    "image": "https://vcplayground.org/examples/age-verification/image.png",
     "name": "TruAge"
   },
   "issuanceDate": "2025-07-15T00:00:00Z",