fix: updating pyproject.toml for poetry build-system

Author: captivus

pyproject.toml

@@ -18,6 +18,10 @@ classifiers = [
   "Topic :: Scientific/Engineering :: Artificial Intelligence",
 ]
 
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
+
 [tool.poetry.dependencies]
 python = ">=3.8.1,<3.12" # updated for llama-index dependency
 black = "23.3.0"