message: Add missing shell specifiers
diff: @@ -234,6 +234,7 @@ jobs:
  run: |
  CTEST_CONFIG="Debug"
  cd ${{ env.MFEM_TOP_DIR }} && cmake --build build --target check --config ${CTEST_CONFIG}
  + shell: bash
  - name: cmake unit tests (Ubuntu 20.04)
  if: matrix.build-system == 'cmake' && matrix.os == 'ubuntu-20.04'
  @@ -248,6 +249,7 @@ jobs:
  run: |
  CTEST_CONFIG="Release"
  cd ${{ env.MFEM_TOP_DIR }}/build && ctest --output-on-failure -C ${CTEST_CONFIG}
  + shell: bash
  # Code coverage (process and upload reports)
  - name: codecov
  