Bump sequelize from 6.24.0 to 6.29.0 in /server

Bumps [sequelize](https://github.com/sequelize/sequelize) from 6.24.0 to 6.29.0.
- [Release notes](https://github.com/sequelize/sequelize/releases)
- [Commits](sequelize/sequelize@v6.24.0...v6.29.0)

---
updated-dependencies:
- dependency-name: sequelize
  dependency-type: direct:production
...

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