ci: Update shell

Author: softwaredevelop

.github/workflows/python-linter.yml

@@ -42,10 +42,12 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - name: Upgrade pip, Install nox
+        shell: bash
         run: |
           python -m pip install --upgrade pip
           python -m pip install nox
       - name: Lint
+        shell: bash
         run: |
           nox \
           --error-on-missing-interpreters \