heasoft update

[falkben]

Heasoft 6.29 was released in July. I'm currently using 6.28 locally and in the github actions, but it may be worth upgrading since there appears to be a few improvements for Swift:

https://heasarc.gsfc.nasa.gov/docs/software/heasoft/release_notes.html

@mdecleir would be helpful to have you look over the specific changes for Swift if you can spot anything specific that we might want to look into switching as a part of our pipeline (e.g. improvements to uvotimage).

[mdecleir]

None of the updates seem to be crucial for our pipeline in the sense that there seem to be no bug fixes. They mainly added functionality. It looks like e.g. uvotimage is now capable of creating bad pixel maps as well, which possibly means one does not have to run the uvotbadpix function anymore. So this could maybe save one step in our pipeline. However, since our pipeline works, I would not waste too much time in figuring out the new functionalities. In the end, I think it would be good to update to the newest version before making big changes to the code, just to make sure everything is still compatible and running as expected. When you do, make sure to check the "before" and "after" output files to see if nothing changed.