Fix tests

Author: erri120

tests/GameFinder.StoreHandlers.GOG.Tests/ArrangeHelpers.cs

@@ -28,7 +28,7 @@ public static IEnumerable<GOGGame> SetupGames(IFileSystem fileSystem, InMemoryRe
                 gameKey.AddValue("gameID", id.ToString(CultureInfo.InvariantCulture));
                 gameKey.AddValue("gameName", name);
                 gameKey.AddValue("path", path.GetFullPath());
-                gameKey.AddValue("buildId", buildId);
+                gameKey.AddValue("buildId", $"{buildId}");
 
                 return new GOGGame(GOGGameId.From(id), name, path, buildId);
             })