Update valid python versions

pyproject.toml

@@ -22,7 +22,7 @@ name = "zampy"
 description = "python package for getting Land Surface Model input data."
 readme = "README.md"
 license = "Apache-2.0"
-requires-python = ">=3.10, <3.12"
+requires-python = ">=3.10, <3.13"
 authors = [
   {email = "[email protected]"},
   {name = "Bart Schilperoort, Yang Liu, Fakhereh Alidoost"}