add jetbrains.com/help/acp link (#315)

Author: ignatov

docs/overview/clients.mdx

@@ -11,7 +11,7 @@ The following clients can be used with an ACP Agent:
 - DuckDB
   - through the [sidequery/duckdb-acp](https://github.com/sidequery/duckdb-acp) extension
 - Emacs via [agent-shell.el](https://github.com/xenodium/agent-shell)
-- [JetBrains _(coming soon)_](https://blog.jetbrains.com/ai/2025/10/jetbrains-zed-open-interoperability-for-ai-coding-agents-in-your-ide/)
+- [JetBrains](https://www.jetbrains.com/help/ai-assistant/acp.html)
 - [marimo notebook](https://github.com/marimo-team/marimo)
 - [neovim](https://neovim.io)
   - through the [CodeCompanion](https://github.com/olimorris/codecompanion.nvim) plugin