Update action

Author: jorgensd

.github/actions/install-dependencies/action.yml

@@ -15,12 +15,12 @@ runs:
     - name: Setup conda-forge
       uses: conda-incubator/setup-miniconda@v2
       with:
-          miniforge-variant: Mambaforge
-          miniforge-version: latest
+          # miniforge-variant: Mambaforge
+          # miniforge-version: latest
           activate-environment: mpi-tutorial
           python-version: ${{ inputs.python-version }}
           # Do not use mamba as it resolves differently than conda
-          use-mamba: false
+          # use-mamba: false
           # uncomment to install env in one go (without caching)
           # environment-file: environment.yml
           # needed for caching