Update setup.py

fix missing comma

Author: asobczyk

setup.py

@@ -52,7 +52,7 @@ def read_readme(fname):
     author='Sobczyk Aleksandros',
     author_email='[email protected]',
     license='MIT',
-    url='https://githib.com/IBM/pylspack'
+    url='https://githib.com/IBM/pylspack',
     long_description=read_readme('README.md'),
     long_description_content_type='text/markdown',
     py_modules=['pylspack.linalg_kernels', 'pylspack.leverage_scores'],