Update pyproject.toml

Author: lukehinds

pyproject.toml

@@ -16,7 +16,7 @@ authors = [
 classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Developers",
-    "License :: OSI Approved :: Apache-2.0 License",
+    "License :: OSI Approved :: Apache Software License",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",