Update dependency langchain-core to v0.3.31

requirements.txt

@@ -72,7 +72,7 @@ jsonschema-specifications==2024.10.1 ; python_full_version >= "3.12.0" and pytho
 jsonschema==4.23.0 ; python_full_version >= "3.12.0" and python_full_version < "4.0.0"
 khl-py==0.3.17 ; python_full_version >= "3.12.0" and python_full_version < "4.0.0"
 kiwisolver==1.4.8 ; python_full_version >= "3.12.0" and python_full_version < "4.0.0"
-langchain-core==0.3.29 ; python_full_version >= "3.12.0" and python_version < "4.0"
+langchain-core==0.3.31 ; python_full_version >= "3.12.0" and python_version < "4.0"
 langchain-text-splitters==0.3.5 ; python_full_version >= "3.12.0" and python_version < "4.0"
 langchain==0.3.14 ; python_full_version >= "3.12.0" and python_version < "4.0"
 langconv @ git+https://github.com/OasisAkari/langconv.py.git@975ee0896096b63148f0930db762607a5a2113df ; python_full_version >= "3.12.0" and python_full_version < "4.0.0"