Fix doc comment for redirectConfiguration (swift-server#266)

`redirectConfiguration` can't default to `false` as it's not a boolean value, and the default value is `RedirectConfiguration()`.

Co-authored-by: Johannes Weiss <johannesweiss@apple.com>
Co-authored-by: Artem Redkin <artem@redkin.me>

Author: 3 people

Sources/AsyncHTTPClient/HTTPClient.swift

@@ -621,7 +621,7 @@ public class HTTPClient {
     public struct Configuration {
         /// TLS configuration, defaults to `TLSConfiguration.forClient()`.
         public var tlsConfiguration: Optional<TLSConfiguration>
-        /// Enables following 3xx redirects automatically, defaults to `false`.
+        /// Enables following 3xx redirects automatically, defaults to `RedirectConfiguration()`.
         ///
         /// Following redirects are supported:
         ///  - `301: Moved Permanently`