fix: renamed confirmationMethod to confidenceMethod in example

Author: Oliver Terbu

index.html

@@ -3024,7 +3024,7 @@ <h3>Confidence Method</h3>
   "issuer": "https://example.edu/issuers/14",
   "validFrom": "2010-01-01T19:23:24Z",
   "credentialSubject": {
-    <span class="highlight">"confirmationMethod": [{
+    <span class="highlight">"confidenceMethod": [{
       "type": "VerificationKeyConfirmation",
       "publicKeyJwk": {
         "crv": "Ed25519",