Update .openpublishing.publish.config.json

.openpublishing.publish.config.json

@@ -66,7 +66,7 @@
     {
       "path_to_root": "preview/azure-storage-java",
       "url": "https://github.com/Azure/azure-storage-java",
-      "branch": "New-Storage-SDK-V10-Preview",
+      "branch": "vNext",
       "branch_mapping": {}
     }
   ],
@@ -134,4 +134,4 @@
       }
     }
   ]
-}
+}