Generic parameter 'S' shadows generic parameter from outer scope with the same name; this is an error in Swift 6

[Aw79]

Hello ✌️,

in /Sources/Operators/Internal/Timer.swift there are warnings in func addSubscriber<S: Subscriber>(_ sub: S) and internal func receive<S: Subscriber>(subscriber: S)
like Generic parameter 'S' shadows generic parameter from outer scope with the same name; this is an error in Swift 6.

This can very easily be fixed by renaming the Generics of the methods.

I would like to provide a PR to solve this.

Cheers,
Andy