src: register ext reference for Fingerprint512

Refs: nodejs#39809
Refs: nodejs#40239

Author: tniessen

src/crypto/crypto_x509.cc

@@ -572,6 +572,7 @@ void X509Certificate::RegisterExternalReferences(
   registry->Register(ValidFrom);
   registry->Register(Fingerprint);
   registry->Register(Fingerprint256);
+  registry->Register(Fingerprint512);
   registry->Register(KeyUsage);
   registry->Register(SerialNumber);
   registry->Register(Pem);