try to fix macos action

Author: guglielmopadula

.github/workflows/testing_pr.yml

@@ -25,11 +25,11 @@ jobs:
         python-version: ${{ matrix.python-version }}
 
     - name: Setup conda
-      uses: s-weigand/setup-conda@v1
+      uses: conda-incubator/setup-miniconda@v3
       with:
-        update-conda: true
+        auto-update-conda: true
         python-version: ${{ matrix.python-version }}
-        conda-channels: anaconda, conda-forge
+        channels: anaconda, conda-forge
 
     - name: Install Python dependencies
       run: |