Update "refreshService" example to VCDM2.0

Author: peacekeeper

Diff for: index.html

@@ -3307,14 +3307,13 @@ <h3>Refreshing</h3>
           title="Use of the refreshService property by an issuer">
 {
   "@context": [
-    "https://www.w3.org/2018/credentials/v1",
-    "https://w3id.org/age/v1",
-    "https://w3id.org/security/suites/ed25519-2020/v1"
+    "https://www.w3.org/ns/credentials/v2",
+    "https://w3id.org/age/v1"
   ],
   "type": ["VerifiableCredential", "AgeVerificationCredential"],
   "issuer": "did:key:z6MksFxi8wnHkNq4zgEskSZF45SuWQ4HndWSAVYRRGe9qDks",
-  "issuanceDate": "2024-04-03T00:00:00.000Z",
-  "expirationDate": "2024-12-15T00:00:00.000Z",
+  "validFrom": "2024-04-03T00:00:00.000Z",
+  "validUntil": "2024-12-15T00:00:00.000Z",
   "name": "Age Verification Credential",
   "credentialSubject": {
     "overAge": 21