server: doc cleanup

server/src/bin/letterbox-server.rs

@@ -31,7 +31,7 @@ use tokio::{net::TcpListener, sync::Mutex};
 use tower_http::trace::{DefaultMakeSpan, TraceLayer};
 use tracing::info;
 
-// Make our own error that wraps `anyhow::Error`.
+// Make our own error that wraps `ServerError`.
 struct AppError(letterbox_server::ServerError);
 
 // Tell axum how to convert `AppError` into a response.