fix typo in setup.py package_data (#701)

This change fixes a typo in setup.py package_data which prevents the
type information from being exported.

fixes: #699

Author: terencehonles

setup.py

@@ -15,7 +15,7 @@
     include_package_data=True,
     package_data={
         '': ['README.rst'],
-        'rq': ['py.typed'],
+        'django_rq': ['py.typed'],
     },
     install_requires=['django>=3.2', 'rq>=2', 'redis>=3.5'],
     extras_require={