Update pyproject.toml to free to use but with restrictions

Author: bobleesj

pyproject.toml

@@ -20,7 +20,7 @@ classifiers = [
         'Environment :: Console',
         'Intended Audience :: Developers',
         'Intended Audience :: Science/Research',
-        'License :: Other/Proprietary License',
+        'License :: Free To Use But Restricted',
         'Operating System :: MacOS :: MacOS X',
         'Operating System :: Microsoft :: Windows',
         'Operating System :: POSIX',