from @rantoniuk in #85 (comment)

What would you think about having a single summary comment that has info on what stages/stacks were processed? It could just be a single comment saying that stacks x,y,z had no changes.

Right now it's actually unclear when the comment was generated/updated and it's only visible upon clicking the dropdown on the comment box.

I would say that the comment should look like this:

No changes detected. <--- only in case no stacks have a difference

Generated for commit X (timestamp) <--- added timestamp here