incorporating review comments

Author: preetkaran20

src/main/java/org/zaproxy/zap/extension/jwt/attacks/SignatureAttack.java

@@ -132,7 +132,10 @@ private boolean executePubliclyWellKnownHMacSecretAttack() {
                                 Alert.CONFIDENCE_HIGH,
                                 MessageFormat.format(
                                         JWTI18n.getMessage(
-                                                "jwt.scanner.server.vulnerability.signatureAttack.publiclyKnownSecrets.param"),
+                                                MESSAGE_PREFIX
+                                                        + VulnerabilityType.PUBLICLY_KNOWN_SECRETS
+                                                                .getMessageKey()
+                                                        + ".param"),
                                         jwtHolder.getBase64EncodedToken(),
                                         secret),
                                 serverSideAttack);