Update POS in tagging example
@@ -36,7 +36,7 @@ for token in doc:
| Text | Lemma | POS | Tag | Dep | Shape | alpha | stop |
| ------- | ------- | ------- | ----- | ---------- | ------- | ------- | ------- |
| Apple | apple | `PROPN` | `NNP` | `nsubj` | `Xxxxx` | `True` | `False` |
-| is | be | `VERB` | `VBZ` | `aux` | `xx` | `True` | `True` |
+| is | be | `AUX` | `VBZ` | `aux` | `xx` | `True` | `True` |
| looking | look | `VERB` | `VBG` | `ROOT` | `xxxx` | `True` | `False` |
| at | at | `ADP` | `IN` | `prep` | `xx` | `True` | `True` |
| buying | buy | `VERB` | `VBG` | `pcomp` | `xxxx` | `True` | `False` |
