CI: updating URL of nightly wheels

Author: bsipocz

tox.ini

@@ -48,7 +48,7 @@ extras =
 
 
 commands =
-    devdeps: pip install -U --pre --only-binary :all: -i https://pypi.anaconda.org/scipy-wheels-nightly/simple numpy
+    devdeps: pip install -U --pre --only-binary :all: -i https://pypi.anaconda.org/scientific-python-nightly-wheels/simple numpy
     devdeps: pip install -U --pre -i https://pypi.anaconda.org/astropy/simple astropy
 
     pip freeze