add long description type to the setup.py

Author: Sispheor

setup.py

@@ -37,6 +37,7 @@ def read_version_py(file_name):
     version=version,
     description='Kalliope is a modular always-on voice controlled personal assistant designed for home automation.',
     long_description=long_description,
+    long_description_content_type='text/markdown',
     url='https://github.com/kalliope-project/kalliope',
     author='The dream team of Kalliope-project',
     author_email='[email protected]',