missed shell

Author: dan-mm

.github/actions/gmt-pytest/action.yml

@@ -33,6 +33,7 @@ runs:
 
     - name: Install docker for MacOS
       if: runner.os == 'macOS'
+      shell: bash
       run: |
         brew install docker docker-compose
         mkdir -p ~/.docker/cli-plugins
@@ -86,7 +87,7 @@ runs:
 
     - name: Setup upterm session
       uses: lhotari/action-upterm@v1
-      
+
     - name: Start Test container
       shell: bash
       working-directory: ${{ inputs.gmt-directory }}/tests