docs: add pylate example usage (#8)

- Update README.md (f76d01524d64108451097bb74b17681af7cff771)

README.md

@@ -136,12 +136,28 @@ JinaColBERT V2 offers three different versions for different embeddings dimensio
 
 `jina-colbert-v2` is trained with flash attention and therefore requires `einops` and `flash_attn` to be installed.
 
-To use the model, you could either use the Standford ColBERT library or use the `ragatouille` package that we provide.
+To use the model, you could either use the Standford ColBERT library or use the `pylate`/`ragatouille` package that we provide.
 
 ```bash
 pip install -U einops flash_attn
-pip install -U ragatouille
-pip install -U colbert-ai
+pip install -U ragatouille # or
+pip install -U colbert-ai # or
+pip install -U pylate
+```
+
+### PyLate
+
+```python
+# Please refer to Pylate: https://github.com/lightonai/pylate for detailed usage
+from pylate import indexes, models, retrieve
+
+model = models.ColBERT(
+    model_name_or_path="jinaai/jina-colbert-v2",
+    query_prefix="[QueryMarker]",
+    document_prefix="[DocumentMarker]",
+    attend_to_expansion_tokens=True,
+    trust_remote_code=True,
+)
 ```
 
 ### RAGatouille