Use conda instead of mamba

Author: chrisburr

.github/workflows/build-and-test.yml

@@ -42,7 +42,7 @@ jobs:
           environment-file: scripts/environment.yml
       - name: Create installer
         run: |
-          CONDA_SUBDIR=${{ matrix.target_arch }} mamba create --name constructor-${{ matrix.target_arch }} 'micromamba>=0.22'
+          CONDA_SUBDIR=${{ matrix.target_arch }} conda create --name constructor-${{ matrix.target_arch }} 'micromamba>=0.22'
           CONDA_STANDALONE_PATH="$(conda info --envs | grep constructor-${{ matrix.target_arch }} | sed -E 's@([^ ]+ +)@@g')/bin/micromamba"
           pip install git+http://github.com/conda/[email protected]
           if [ "${{ matrix.target_arch }}" = osx-64 ]; then