Update docs/cli.md

docs/cli.md

@@ -290,8 +290,10 @@ poetry update requests toml
 Note that this will not update versions for dependencies outside their
 [version constraints]({{< relref "dependency-specification#version-constraints" >}})
 specified in the `pyproject.toml` file.
-In other terms, `poetry update foo` will be a no-op if the only latest version for `foo` lies outside the constraint specified for `foo` in the `pyproject.toml` file. (More info on constraints can be found in our (Version Requirements)[https://python-poetry.org/docs/dependency-specification/#version-constraints].)
-In order for `foo` to be updated, you must update the constraint. You can do this using the `add` command.
+In other terms, `poetry update foo` will be a no-op if the version constraint
+specified for `foo` is `~2.3` or `2.3` and `2.4` is available.
+In order for `foo` to be updated, you must update the constraint, for example `^2.3`.
+You can do this using the `add` command.
 
 ### Options