Remove addressCity term instead use addressLocality, correct context url

Author: bparth24

credentials/utopia-birth-certificate-vc-v2/credential.json

@@ -1,7 +1,7 @@
 {
   "@context": [
     "https://www.w3.org/ns/credentials/v2",
-    "https://w3id.org/vital-records/v1rc2",
+    "https://w3id.org/vital-records/v1rc3",
     "https://w3id.org/vc/render-method/v2rc1"
   ],
   "type": [
@@ -78,9 +78,8 @@
       "address": {
         "type": "PostalAddress",
         "streetAddress": "123 Hospital Rd",
-        "addressLocality": "CityTown",
+        "addressLocality": "Lower Utopia City",
         "addressRegion": "RegionState",
-        "addressCity": "Lower Utopia City",
         "postalCode": "12345"
       },
       "birthLocationDescription": "Ground floor, maternity ward",

credentials/utopia-birth-certificate-vc-v2/queries.json

@@ -7,6 +7,7 @@
         "example": {
           "@context": [
             "https://www.w3.org/ns/credentials/v2",
+            "https://w3id.org/vital-records/v1rc3",
             "https://w3id.org/vc/render-method/v2rc1"
           ],
           "type": ["BirthCertificateCredential"]