refactor(net): elide lifetime

src/net/system.rs

@@ -695,7 +695,7 @@ impl<'net> WhenRequest<'net, WhenBuildRequest> {
         }
     }
 }
-impl<'net> WhenRequest<'net, WhenBuildResponse> {
+impl WhenRequest<'_, WhenBuildResponse> {
     /// Specifies a header that will be on the response sent for the matching request.
     #[must_use]
     pub fn header(mut self, name: impl Into<String>, value: impl Into<String>) -> Self {