[LLDB][SBProgress] Quick fix to the progress formatting (#157561)

Earlier today I was looking at the SBProgress documentation with a
colleague and found another instance where the swig block wasn't
formatting correctly. I've adjusted the docs slightly to fix this. I
don't actually know how to see a preview of our docstrings but I believe
this will fix it.

<img width="829" height="234" alt="image"
src="https://github.com/user-attachments/assets/8ef3a2df-92b9-4157-a452-f5e1ec51aa9a"
/>
GitOrigin-RevId: 1e1711347f59956ecf06d4b3050cb248a06661b7
1 file changed