Use miniforge instead of mambaforge (#4678)

* Use miniforge instead of mambaforge

* Fixed version number

* Try miniforge-variant

.github/workflows/CI.yml

@@ -184,17 +184,17 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - uses: conda-incubator/setup-miniconda@v2
+      - uses: conda-incubator/setup-miniconda@v3
         name: "Prepare base dependencies"
         if: matrix.python-version == 'pypy'
         with:
           activate-environment: build
           environment-file: devtools/ci/gh-actions/conda-envs/build-${{ matrix.env }}.yml
           auto-activate-base: false
-          miniforge-variant: Mambaforge-pypy3
+          miniforge-variant: Miniforge-pypy3
           use-mamba: true
 
-      - uses: conda-incubator/setup-miniconda@v2
+      - uses: conda-incubator/setup-miniconda@v3
         name: "Prepare base dependencies"
         if: matrix.python-version != 'pypy'
         with:
@@ -202,7 +202,7 @@ jobs:
           activate-environment: build
           environment-file: devtools/ci/gh-actions/conda-envs/build-${{ matrix.env }}.yml
           auto-activate-base: false
-          miniforge-variant: Mambaforge
+          miniforge-variant: Miniforge3
           use-mamba: true
 
       - name: "Install CUDA on Ubuntu (if needed)"