Fix SPDX classifier

Author: pentest-gg

pyproject.toml

@@ -72,9 +72,10 @@ authors = [
 ]
 description = "FastAPI Users database adapter for AWS DynamoDB"
 readme = "README.md"
+license = "Apache-2.0"
+license-files = [ "LICENSE" ]
 dynamic = ["version"]
 classifiers = [
-    "License :: OSI Approved :: Apache 2.0 License",
     "Development Status :: 5 - Production/Stable",
     "Framework :: FastAPI",
     "Framework :: AsyncIO",