docs: Update VECTOR_STORE comment to include pgvector (#2211)

Co-authored-by: root <root@MD-CG-010>

application/core/settings.py

@@ -43,7 +43,7 @@ class Settings(BaseSettings):
     PARSE_PDF_AS_IMAGE: bool = False
     PARSE_IMAGE_REMOTE: bool = False
     VECTOR_STORE: str = (
-        "faiss"  #  "faiss" or "elasticsearch" or "qdrant" or "milvus" or "lancedb"
+        "faiss"  #  "faiss" or "elasticsearch" or "qdrant" or "milvus" or "lancedb" or "pgvector"
     )
     RETRIEVERS_ENABLED: list = ["classic_rag"]
     AGENT_NAME: str = "classic"