I found some. I hope you don't mind but I downloaded it and put it in Photoshop and Made an adjustment level (Brightness and Contrast) and reduced brightness and increased Contrast and got this: I tried to put the actuall picture in the post but gave up trying.
If you look at the right over wing exit and count 2 windows to the right then follow that up all the way to the top you will see a very small dust particle it can been seen but just.
Good luck with it nice shot
I'm not 100% sure about this but sensor dust appears as a much bigger
and circular spot. Those in your picture, I would dare to say, could be birds or something else. You might as well clone them out.