[cicd] conda build specify shell for pip install

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

@@ -25,6 +25,7 @@ jobs:
           # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
           flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
       - name: Install package
+        shell: bash -el {0}
         run: |
           echo $(pwd)
           echo $(which pip)