Hello Antonia Martinez
As far as I know, there isn’t currently a user-facing toggle to disable this specific capitalization behavior.
This is one of those cases where 'Change the players, not the game' applies, don’t you think? 😆 Well, by saying that, I mean, you might try adjusting your speech cadence, try speaking “it” more fluidly within the sentence to reduce misinterpretation. Additionally, ensure that your system is fully updated via Settings > Windows Update, as recent patches have addressed some Voice Access quirks.
Harry.