setup.py: fix URLs that are specific to python-sdbus-networkmanager

The documentation URL in the README.md pointed to
'https://python-sdbus-networkmanager.readthedocs.io', but the one in
setup.py pointed to python-sdbus instead.

Fix the documentation URL, and while at it fix some others that had
the same issue.

Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be>

Author: rmelotte

setup.py

@@ -30,15 +30,15 @@
     long_description=long_description,
     long_description_content_type='text/markdown',
     version='2.0.0',
-    url='https://github.com/python-sdbus/python-sdbus',
+    url='https://github.com/python-sdbus/python-sdbus-networkmanager',
     author='igo95862',
     author_email='igo95862@yandex.ru',
     license='LGPL-2.1-or-later',
     keywords='dbus networkmanager networking linux freedesktop',
     project_urls={
-        'Documentation': 'https://python-sdbus.readthedocs.io/en/latest/',
-        'Source': 'https://github.com/python-sdbus/python-sdbus/',
-        'Tracker': 'https://github.com/python-sdbus/python-sdbus/issues/',
+        'Documentation': 'https://python-sdbus-networkmanager.readthedocs.io/en/latest/',
+        'Source': 'https://github.com/python-sdbus/python-sdbus-networkmanager/',
+        'Tracker': 'https://github.com/python-sdbus/python-sdbus-networkmanager/issues/',
     },
     classifiers=[
         'Development Status :: 4 - Beta',