feat(appdev): removing bash annotation for spanner commands in tutorial.md
feat(appdev): removing bash annotation for spanner commands in tutorial.md

GoogleCloudPlatform/gcp-getting-started-lab-jp,GoogleCloudPlatform/gcp-getting-started-lab-jp,GoogleCloudPlatform/gcp-getting-started-lab-jp,GoogleCloudPlatform/gcp-getting-started-lab-jp