python3Packages.llama-index-readers-weather: fix build by setting hatchling as build-system

pkgs/development/python-modules/llama-index-readers-weather/default.nix

···
   buildPythonPackage,
   fetchPypi,
   llama-index-core,
-  poetry-core,
+  hatchling,
   pyowm,
   pythonOlder,
   pytestCheckHook,
···
     hash = "sha256-qgrHlJXOKWY5UnB2lZAJun3xA9sxn5+ZNNI6+aDnE98=";
   };
 
-  build-system = [ poetry-core ];
+  build-system = [ hatchling ];
 
   dependencies = [
     llama-index-core