build(deps): bump express from 4.17.1 to 4.21.0 in /frontend#12

dependabot[bot] wants to merge 1 commit intomaingooglecreativelab/tiny-motion-trainer:mainfrom

dependabot/npm_and_yarn/frontend/express-4.21.0googlecreativelab/tiny-motion-trainer:dependabot/npm_and_yarn/frontend/express-4.21.0Copy head branch name to clipboard