Update python-package-conda.yml

Author: rcervinoucm

.github/workflows/python-package-conda.yml

@@ -30,7 +30,7 @@ jobs:
         # $CONDA is an environment variable pointing to the root of the miniconda directory
         echo $CONDA/bin >> $GITHUB_PATH
     - name: Add MKL_THREADING_LAYER variable
-      run: echo "::set-env name=MKL_THREADING_LAYER::GNU"
+      run:  echo "MKL_THREADING_LAYER=GNU" >> $GITHUB_ENV
     - name: Install dependencies
       run: |
         conda env update --file environment.yml --name base --solver=classic