Use mambaforge variant

Author: oleksandr-pavlyk

.github/workflows/conda-package.yml

@@ -85,8 +85,9 @@ jobs:
 
       - uses: conda-incubator/setup-miniconda@v3
         with:
+          miniforge-variant: Mambaforge
           miniforge-version: latest
-          activate-environment: test
+          activate-environment: build
           channels: conda-forge
           python-version: ${{ matrix.python }}