fix: update classifier name

Author: pkazmier

pyproject.toml

@@ -16,7 +16,7 @@ classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Intended Audience :: Developers",
   "Intended Audience :: System Administrators",
-  "License-Expression :: Apache-2.0",
+  "License :: OSI Approved :: Apache Software License",
   "Operating System :: Unix",
   "Operating System :: POSIX",
   "Operating System :: Microsoft :: Windows",