fixup! Improve default path for Synology Download Station

Fixes: Missing default path for Download Station
Fixes: Error when getting destination path for Synology Download Station in health check

(cherry picked from commit 18a846f4ad352009d1ce6ae3891096d380fa44e3)

src/NzbDrone.Core.Test/Download/DownloadClientTests/DownloadStationTests/TorrentDownloadStationFixture.cs

@@ -427,7 +427,7 @@ namespace NzbDrone.Core.Test.Download.DownloadClientTests.DownloadStationTests
             id.Should().NotBeNullOrEmpty();
 
             Mocker.GetMock<IDownloadStationTaskProxy>()
-                  .Verify(v => v.AddTaskFromUrl(It.IsAny<string>(), null, It.IsAny<DownloadStationSettings>()), Times.Once());
+                  .Verify(v => v.AddTaskFromUrl(It.IsAny<string>(), _defaultDestination, It.IsAny<DownloadStationSettings>()), Times.Once());
         }
 
         [Test]

src/NzbDrone.Core.Test/Download/DownloadClientTests/DownloadStationTests/UsenetDownloadStationFixture.cs

@@ -304,7 +304,7 @@ namespace NzbDrone.Core.Test.Download.DownloadClientTests.DownloadStationTests
             id.Should().NotBeNullOrEmpty();
 
             Mocker.GetMock<IDownloadStationTaskProxy>()
-                  .Verify(v => v.AddTaskFromData(It.IsAny<byte[]>(), It.IsAny<string>(), null, It.IsAny<DownloadStationSettings>()), Times.Once());
+                  .Verify(v => v.AddTaskFromData(It.IsAny<byte[]>(), It.IsAny<string>(), _defaultDestination, It.IsAny<DownloadStationSettings>()), Times.Once());
         }
 
         [Test]