update docs

docs/README.md

@@ -17,7 +17,7 @@ subsystem, how they fit together, and the end-to-end flows that tie them.
 | [tasks.md](tasks.md) | Tasks — button/emoji/modal/step/built-in/persistable/scheduled tasks |
 | [persistence.md](persistence.md) | Database — Hibernate/JPA, Flyway, entities, repositories, services |
 | [music.md](music.md) | Music — Lavalink node & client, queue, event dispatch |
-| [web-api.md](web-api.md) | HTTP Web API — internal control & introspection server |
+| [web-api.md](web-api.md) | HTTP Web API — Javalin server for control, introspection & music |
 | [threading.md](threading.md) | Threading & scheduling infrastructure |
 | [utilities-and-bootstrap.md](utilities-and-bootstrap.md) | Utilities, configuration, logging, exceptions |