chore(deps): bump h2 from 2.1.214 to 2.2.220 in /demo (#87)

Bumps [h2](https://github.com/h2database/h2database) from 2.1.214 to 2.2.220.
- [Release notes](https://github.com/h2database/h2database/releases)
- [Commits](h2database/h2database@version-2.1.214...version-2.2.220)

---
updated-dependencies:
- dependency-name: com.h2database:h2
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>