docs: link to the known bug with --watch (#2449)

Author: eagleflo

website/src/docs/guide.md

@@ -2371,9 +2371,10 @@ if called by another task, either directly or as a dependency.
 ::: warning
 
 The watcher can misbehave in certain scenarios, in particular for long-running
-servers. There is a known bug where child processes of the running might not be
-killed appropriately. It's advised to avoid running commands as `go run` and
-prefer `go build [...] && ./binary` instead.
+servers. There is a [known bug](https://github.com/go-task/task/issues/160)
+where child processes of the running might not be killed appropriately. It's
+advised to avoid running commands as `go run` and prefer `go build [...] &&
+./binary` instead.
 
 If you are having issues, you might want to try tools specifically designed for
 live-reloading, like [Air](https://github.com/air-verse/air/). Also, be sure to