fix: finalize channels rename cleanup

docs/providers/index.md

@@ -9,6 +9,8 @@ read_when:
 Clawdbot can use many LLM providers. Pick a provider, authenticate, then set the
 default model as `provider/model`.
 
+Looking for chat channel docs (WhatsApp/Telegram/Discord/Slack/etc.)? See [Channels](/channels).
+
 ## Quick start
 
 1) Authenticate with the provider (usually via `clawdbot onboard`).