fix snudda url

packages/py-snudda/package.py

@@ -2,7 +2,7 @@ from spack import *
 
 class PySnudda(Package):
     homepage = 'https://pypi.org/project/snudda/'
-    url      = 'https://pypi.org/packages/source/s/snudda/snudda-1.2.9-py3-none-any.whl'
+    url      = 'https://files.pythonhosted.org/packages/py3/s/snudda/snudda-1.2.9-py3-none-any.whl'
     list_url = 'https://pypi.org/simple/snudda/'
 
     maintainers = ['hjorth','akarmas']