[proxy] Fix rendering for top-level rustdoc
@@ -82,6 +82,7 @@ use outbound::Outbound;
/// Runs a sidecar proxy.
///
/// The proxy binds two listeners:
+///
/// - a private socket (TCP or UNIX) for outbound requests to other instances;
/// - and a public socket (TCP and optionally TLS) for inbound requests from other
/// instances.
