fix: relax numpy version requirement

In NumPy release 1.23.2, Python 3.11 support was added. See https://github.com/numpy/numpy/releases/tag/v1.23.2.

Author: lemorage

examples/text_embedding/main.py

@@ -1,11 +1,12 @@
-from dotenv import load_dotenv
-from psycopg_pool import ConnectionPool
-from pgvector.psycopg import register_vector
+import os
 from typing import Any
+
 import cocoindex
-import os
-from numpy.typing import NDArray
 import numpy as np
+from dotenv import load_dotenv
+from numpy.typing import NDArray
+from pgvector.psycopg import register_vector
+from psycopg_pool import ConnectionPool
 
 
 @cocoindex.transform_flow()
@@ -50,8 +51,15 @@ def text_embedding_flow(
             chunk_size=2000,
             chunk_overlap=500,
         )
+        func = cocoindex.functions.SplitRecursively()
+        chunks = func(
+            text=doc["content"],
+            language="markdown",
+            chunk_size=2000,
+            chunk_overlap=500,
+        )
 
-        with doc["chunks"].row() as chunk:
+        with chunks.row() as chunk:
             chunk["embedding"] = text_to_embedding(chunk["text"])
             doc_embeddings.collect(
                 filename=doc["filename"],