Add description format

Author: addu390

setup.py

@@ -26,6 +26,7 @@
       url='https://github.com/addu390/python-logging-kafka',
       description='Kafka log producer from Python/Django',
       long_description=README,
+      long_description_content_type="text/markdown",
       keywords='logging kafka logs',
       license='MIT',
       author='Adesh Nalpet',