update examples to show a mix of DID and URI identifiers

Author: gabe

index.html

@@ -1298,7 +1298,7 @@ <h3>Contexts</h3>
   ]</span>,
   "id": "http://university.example/credentials/58473",
   "type": ["VerifiableCredential", "ExampleAlumniCredential"],
-  "issuer": "https://university.example/issuers/565049",
+  "issuer": "did:example:2g55q912ec3476eba2l9812ecbfe",
   "validFrom": "2010-01-01T00:00:00Z",
   "credentialSubject": {
     "id": "did:example:ebfeb1f712ebc6f1c276e12ec21",
@@ -1850,9 +1850,9 @@ <h3>Credential Subject</h3>
     "name": "Jayden Doe",
     "spouse": "did:example:c276e12ec21ebfeb1f712ebc6f1"
   }, {
-    "id": "did:example:c276e12ec21ebfeb1f712ebc6f1",
+    "id": "https://subject.example/subject/8675",
     "name": "Morgan Doe",
-    "spouse": "did:example:ebfeb1f712ebc6f1c276e12ec21"
+    "spouse": "https://subject.example/subject/7421"
   }]</span>
 }
         </pre>
@@ -2151,10 +2151,10 @@ <h3>Securing Mechanisms</h3>
   ],
   "id": "http://example.gov/credentials/3732",
   "type": ["VerifiableCredential", "ExampleDegreeCredential"],
-  "issuer": "https://university.example",
+  "issuer": "did:example:6fb1f712ebe12c27cc26eebfe11",
   "validFrom": "2010-01-01T19:23:24Z",
   "credentialSubject": {
-    "id": "did:example:ebfeb1f712ebc6f1c276e12ec21",
+    "id": "https://subject.example/subject/3921",
     "degree": {
       "type": "ExampleBachelorDegree",
       "name": "Bachelor of Science and Arts"