Bump strudy from 3.0.2 to 3.1.1

Bumps [strudy](https://github.com/w3c/strudy) from 3.0.2 to 3.1.1.
- [Commits](https://github.com/w3c/strudy/commits)

---
updated-dependencies:
- dependency-name: strudy
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]