fix: The description content type for setuptools needs to be rst to match the readme

Author: marksweb

setup.py

@@ -134,7 +134,7 @@ def run_tests(self):
     version=meta['version'],
     description=meta['doc'],
     long_description=long_description,
-    long_description_content_type='text/markdown',
+    long_description_content_type='text/x-rst',
     keywords='celery django database result backend',
     author=meta['author'],
     author_email=meta['contact'],