Update appdev/tutorial.md
Update appdev/tutorial.md

Co-authored-by: Kozzy Hasebe <f99e3948582cbc98d2a90de88dee51065c79a41a@users.noreply.github.com>
GoogleCloudPlatform/gcp-getting-started-lab-jp,GoogleCloudPlatform/gcp-getting-started-lab-jp,GoogleCloudPlatform/gcp-getting-started-lab-jp,GoogleCloudPlatform/gcp-getting-started-lab-jp