Fix chroma vectorstore error message (langchain-ai#10457)

- Description: Updated the error message in the Chroma vectorestore,
that displayed a wrong import path for
langchain.vectorstores.utils.filter_complex_metadata.
- Tag maintainer: @sbusso

libs/langchain/langchain/vectorstores/chroma.py

@@ -217,7 +217,7 @@ def add_texts(
                     if "Expected metadata value to be" in str(e):
                         msg = (
                             "Try filtering complex metadata from the document using "
-                            "langchain.vectorstore.utils.filter_complex_metadata."
+                            "langchain.vectorstores.utils.filter_complex_metadata."
                         )
                         raise ValueError(e.args[0] + "\n\n" + msg)
                     else: