Use correct link for github

Author: zzzeek

setup.py

@@ -55,7 +55,7 @@ def run_tests(self):
     keywords='SQLAlchemy collectd',
     author='Mike Bayer',
     author_email='[email protected]',
-    url='http://github.org/sqlalchemy/sqlalchemy-collectd',
+    url='https://github.com/sqlalchemy/sqlalchemy-collectd',
     license='MIT',
     packages=find_packages(".", exclude=["*.tests"]),
     include_package_data=True,