Add URL links to docs for items that are a List

Adding for same fields as apple/app-store-server-library-python#82

Author: alexanderjordanbaker

src/main/java/com/apple/itunes/storekit/model/NotificationHistoryResponse.java

@@ -87,6 +87,7 @@ public NotificationHistoryResponse addNotificationHistoryItem(NotificationHistor
      * An array of App Store server notification history records.
      *
      * @return notificationHistory
+     * @see <a href="https://developer.apple.com/documentation/appstoreserverapi/notificationhistoryresponseitem">notificationHistoryResponseItem</a>
      **/
     public List<NotificationHistoryResponseItem> getNotificationHistory() {
         return notificationHistory;

src/main/java/com/apple/itunes/storekit/model/NotificationTypeV2.java

@@ -5,9 +5,9 @@
 import com.fasterxml.jackson.annotation.JsonValue;
 
 /**
- * A notification type value that App Store Server Notifications V2 uses.
+ * The type that describes the in-app purchase or external purchase event for which the App Store sends the version 2 notification.
  *
- * @see <a href="https://developer.apple.com/documentation/appstoreserverapi/notificationtype">notificationType</a>
+ * @see <a href="https://developer.apple.com/documentation/appstoreservernotifications/notificationtype">notificationType</a>
  */
 public enum NotificationTypeV2 {
 

src/main/java/com/apple/itunes/storekit/model/OrderLookupResponse.java

@@ -76,6 +76,7 @@ public OrderLookupResponse addSignedTransactionsItem(String signedTransactionsIt
      * An array of in-app purchase transactions that are part of order, signed by Apple, in JSON Web Signature format.
      *
      * @return signedTransactions
+     * @see <a href="https://developer.apple.com/documentation/appstoreserverapi/jwstransaction">JWSTransaction</a>
      **/
     public List<String> getSignedTransactions() {
         return signedTransactions;

src/main/java/com/apple/itunes/storekit/model/RefundHistoryResponse.java

@@ -48,6 +48,7 @@ public RefundHistoryResponse addSignedTransactionsItem(String signedTransactions
      * A list of up to 20 JWS transactions, or an empty array if the customer hasn't received any refunds in your app. The transactions are sorted in ascending order by revocationDate.
      *
      * @return signedTransactions
+     * @see <a href="https://developer.apple.com/documentation/appstoreserverapi/jwstransaction">JWSTransaction</a>
      **/
     public List<String> getSignedTransactions() {
         return signedTransactions;

src/main/java/com/apple/itunes/storekit/model/SubscriptionGroupIdentifierItem.java

@@ -65,6 +65,7 @@ public SubscriptionGroupIdentifierItem addLastTransactionsItem(LastTransactionsI
      * An array of the most recent App Store-signed transaction information and App Store-signed renewal information for all auto-renewable subscriptions in the subscription group.
      *
      * @return lastTransactions
+     * @see <a href="https://developer.apple.com/documentation/appstoreserverapi/lasttransactionsitem">lastTransactionsItem</a>
      **/
     public List<LastTransactionsItem> getLastTransactions() {
         return lastTransactions;

src/main/java/com/apple/itunes/storekit/model/Subtype.java

@@ -5,9 +5,9 @@
 import com.fasterxml.jackson.annotation.JsonValue;
 
 /**
- * A notification subtype value that App Store Server Notifications 2 uses.
+ * A string that provides details about select notification types in version 2.
  *
- * @see <a href="https://developer.apple.com/documentation/appstoreserverapi/notificationsubtype">notificationSubtype</a>
+ * @see <a href="https://developer.apple.com/documentation/appstoreservernotifications/subtype">subtype</a>
  */
 public enum Subtype {