`findCustomRoles` in `src/models/Roles.ts` produce "false negative".

Hi there,
I've found that this specific snippet is producing a false negative on older rocket.chat instances.
https://github.com/RocketChat/Rocket.Chat/blob/85fc0ddca134a875b10133751182eb9c65fd4724/packages/models/src/models/Roles.ts#L139-L145

In my Rocket.Chat instance, I have custom roles set up which are already a few years old.
When looking in the db, they're all missing the protected tag within the db.

I stumbled over this issue, when I wanted to get a specific custom role, but my code failed, saying that it couldn't find the role in question.
Could this code be changed, so that it negates everything? e.g. instead of hard-match protected: false, match for the opposite with the protected: { $ne: true }, I think this should also cover non-existend protected tags like in my case.

Thanks.

Start in packages/models/src/models/Roles.ts at the findCustomRoles query around lines 139-145 and inspect how the protected field is matched. Reproduce the lookup with an older custom role that lacks protected, then verify that such roles are returned while roles marked protected still are not.