Add workflow job step to setup Miniforge

Author: matt-graham

.github/workflows/tests.yml

@@ -45,17 +45,22 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
         cache: pip
+        
+    - name: Set up Miniforge
+      uses: conda-incubator/setup-miniconda@v3
+      with:
+        miniforge-version: latest
+    
+    - name: Setup tmate session
+      uses: mxschmitt/action-tmate@v3
+      with:
+        limit-access-to-actor: true
 
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install .[tests]
 
-    - name: Setup tmate session
-      uses: mxschmitt/action-tmate@v3
-      with:
-        limit-access-to-actor: true
-
     - name: Run tests
       if: github.event_name != 'pull_request'
       run: |