Fix linter error

Author: laevandus

Sources/StreamChat/Repositories/AuthenticationRepository.swift

@@ -4,7 +4,7 @@
 
 import Foundation
 
-public typealias TokenProvider = @Sendable (@escaping @Sendable(Result<Token, Error>) -> Void) -> Void
+public typealias TokenProvider = @Sendable (@escaping @Sendable (Result<Token, Error>) -> Void) -> Void
 
 enum EnvironmentState {
     case firstConnection