JavaScript v3: Resore JavaScript v3 item tracker after updates. (#7561)

Author: beqqrry-aws

.doc_gen/metadata/cross_metadata.yaml

@@ -170,6 +170,10 @@ cross_RDSDataTracker:
         - sdk_version: 3
           github: python/cross_service/aurora_item_tracker
           block_content: cross_RDSDataTracker_Python_block.xml
+    JavaScript:
+      versions:
+        - sdk_version: 3
+          block_content: cross_RDSDataTracker_JavaScriptV3_block.xml
     C++:
       versions:
         - sdk_version: 1