Use conda for python too

.github/workflows/continous_integration.yml

@@ -33,12 +33,6 @@ jobs:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v2
 
-      # Set up the python versions
-      - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
-        with:
-          python-version: ${{ matrix.python-version }}
-
       # Runs a set of commands using the runners shell
       - name: set up ssh
         uses: webfactory/ssh-agent@v0.5.4
@@ -51,6 +45,7 @@ jobs:
         with:
           auto-activate-base: true
           activate-environment: ""
+          python-version: ${{ matrix.python-version }}
 
       # Set up conda and install astro packages
       - name: Set up conda