Update Span.__init__ docs (see [ci skip]
@@ -19,11 +19,11 @@ Create a Span object from the `slice doc[start : end]`.
> ```
| Name | Type | Description |
-| ----------- | ---------------------------------------- | ------------------------------------------------------- |
+| ----------- | ---------------------------------------- | ----------------------------------------------------------------------------------------------------------- |
| `doc` | `Doc` | The parent document. |
| `start` | int | The index of the first token of the span. |
| `end` | int | The index of the first token after the span. |
-| `label` | int | A label to attach to the span, e.g. for named entities. |
+| `label` | int / unicode | A label to attach to the span, e.g. for named entities. As of v2.1, the label can also be a unicode string. |
| `vector` | `numpy.ndarray[ndim=1, dtype='float32']` | A meaning representation of the span. |
| **RETURNS** | `Span` | The newly constructed object. |
