Add correct classifier name for pypi

Author: ssinhaleite

setup.cfg

@@ -16,7 +16,7 @@ classifier =
     Environment :: Console
     Intended Audience :: Science/Research
     Intended Audience :: Developers
-    License :: OSI Approved :: Apache License Version 2.0 (Apache-2.0)
+    License :: OSI Approved :: Apache Software License
     Programming Language :: Python :: 3
 keywords =
     spiking neural networks