Great question! And 10 points for reading the license!
If you haven’t seen it, there’s a pretty great FAQ that comes along with the OFL (we have a pretty version online here). There are a couple bullet points in there that are specific to software that should answer your question, but we can save you the trouble:
It’s totally cool. OFL fonts are allowed to be embedded in software, both open-source or commercial. Essentially, as long as you’re selling the program, and not just the font, it’s not a problem.
And attribution is also is not mandatory (sometimes you just can’t), but if you’d like to do it, we’d certainly appreciate it!