Updated default "data" field text in the API documentation, to match the value the UI uses.

src/main/java/org/qortal/data/transaction/RegisterNameTransactionData.java

@@ -26,7 +26,7 @@ public class RegisterNameTransactionData extends TransactionData {
 	@Schema(description = "requested name", example = "my-name")
 	private String name;
 
-	@Schema(description = "simple name-related info in JSON format", example = "{ \"age\": 30 }")
+	@Schema(description = "simple name-related info in JSON or text format", example = "Registered Name on the Qortal Chain")
 	private String data;
 
 	// For internal use

src/main/java/org/qortal/data/transaction/UpdateNameTransactionData.java

@@ -26,7 +26,7 @@ public class UpdateNameTransactionData extends TransactionData {
 	@Schema(description = "new name", example = "my-new-name")
 	private String newName;
 
-	@Schema(description = "replacement simple name-related info in JSON format", example = "{ \"age\": 30 }")
+	@Schema(description = "replacement simple name-related info in JSON or text format", example = "Registered Name on the Qortal Chain")
 	private String newData;
 
 	// For internal use