Update license-file metadata in pyproject.toml (#845)

Author: PProfizi

pyproject.toml

@@ -9,7 +9,8 @@ version = "0.9.3.dev0"
 description = "PyDPF-Post Python library."
 readme = "README.md"
 requires-python = ">=3.9,<4.0"
-license = {file = "LICENSE"}
+license = "MIT"
+license-files = ["LICENSE"]
 authors = [
     {name = "ANSYS, Inc.", email = "[email protected]"},
 ]
@@ -23,7 +24,6 @@ dependencies = [
 classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Science/Research",
-    "License :: OSI Approved :: MIT License",
     "Operating System :: MacOS",
     "Operating System :: Microsoft :: Windows",
     "Operating System :: POSIX",