[Python] Fix the short package description.

Author: kosarev

setup.py

@@ -34,7 +34,7 @@
 # TODO: Do we have a name for the emulator?
 setup(name='z80',
       version='1.0b3',
-      description='Fast and flexible Z80/i8080 Emulator',
+      description='Fast and flexible Z80/i8080 emulator',
       long_description=long_description,
       long_description_content_type='text/markdown',
       author='Ivan Kosarev',