CI: Bump numpydev URL (pandas-dev#33968)

Author: TomAugspurger

ci/deps/azure-37-numpydev.yaml

@@ -16,7 +16,7 @@ dependencies:
   - pip:
     - cython==0.29.16 # GH#34014
     - "git+git://github.com/dateutil/dateutil.git"
-    - "-f https://7933911d6844c6c53a7d-47bd50c35cd79bd838daf386af554a83.ssl.cf2.rackcdn.com"
+    - "--extra-index-url https://pypi.anaconda.org/scipy-wheels-nightly/simple"
     - "--pre"
     - "numpy"
     - "scipy"