fix: Fixed extra char in requirements.txt (#196)

Author: dishaprakash

requirements.txt

@@ -1,6 +1,6 @@
 cloud-sql-python-connector[asyncpg]==1.10.0
 langchain-core==0.2.12
-numpy===1.24.4; python_version<='3.8'
+numpy==1.24.4; python_version<='3.8'
 numpy==1.26.4; python_version>'3.8'
 pgvector==0.3.0
 SQLAlchemy[asyncio]==2.0.31