Added back shell: bash as github actions complains about missing shel…

…l option

.github/actions/pre_test_setup/action.yml

@@ -38,6 +38,7 @@ runs:
 
     - name: Install Cypress if not in cache
       if: steps.cache-cypress-binary.outputs.cache-hit != 'true'
+      shell: bash
       working-directory: packages/volto
       run: make cypress-install