Unstructured upgrade (neo4j-labs#941)

* package upgrade

* Update requirements.txt

* Update requirements.txt

Author: aashipandya

backend/requirements.txt

@@ -30,7 +30,7 @@ nltk==3.9.1
 openai==1.55.1
 opencv-python==4.10.0.84
 psutil==6.1.0
-pydantic==2.9.0
+pydantic==2.9.2
 python-dotenv==1.0.1
 python-magic==0.4.27
 PyPDF2==3.0.1