message: doc(man): clarify `--path` influnce on `target-dir`
diff: @@ -4,6 +4,10 @@ specified with the `CARGO_TARGET_DIR` environment variable, or the
  `build.target-dir` [config value](../reference/config.html).
  {{#if temp-target-dir}} Defaults to a new temporary folder located in the
  temporary directory of the platform.
  +
  +When using `--path`, by default it will use `target` directory in the workspace
  +of the local crate unless `--target-dir`
  +is specified.
  {{else}} Defaults to `target` in the root of the workspace.
  {{/if}}
  {{/option}}
  