FWIW I don’t think there’s anyone at the pygments that maintains individual languages. If there’s anything that will fix the SuperCollider bug, it’s someone on this forum… I have no idea who did the original support for it - it’s probably not too difficult to fix, I’m sure other languages get this correct.
This issue is most likely due to a bug in the grammar used by Linguist rather than a bug in Linguist itself. Linguist uses the Atom syntax grammar (see their grammar index), so you should submit your issue there (https://github.com/supercollider/language-supercollider) and if it gets fixed there, the upstream fix will automatically be included in the next version of Linguist.