Fix upstream miniconda setup (#1011)

Author: jrbourbeau

.github/workflows/upstream.yml

@@ -40,9 +40,8 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Setup Conda Environment
-        uses: conda-incubator/setup-miniconda@v2
+        uses: conda-incubator/setup-miniconda@v3
         with:
-          miniforge-variant: Mambaforge
           miniforge-version: latest
           use-mamba: true
           channel-priority: strict

ci/install.sh

@@ -6,7 +6,7 @@ if [[ ${UPSTREAM_DEV} ]]; then
     conda uninstall --force dask distributed scikit-learn
 
     python -m pip install --no-deps --pre \
-        -i https://pypi.anaconda.org/scipy-wheels-nightly/simple \
+        -i https://pypi.anaconda.org/scientific-python-nightly-wheels/simple \
         scikit-learn
 
     python -m pip install \