build(deps): bump sequelize in /examples/repository-mode

Bumps [sequelize](https://github.com/sequelize/sequelize) from 5.22.5 to 6.29.0.
- [Release notes](https://github.com/sequelize/sequelize/releases)
- [Commits](sequelize/sequelize@v5.22.5...v6.29.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

examples/repository-mode/package.json

@@ -17,7 +17,7 @@
   "dependencies": {
     "body-parser": "^1.18.3",
     "express": "^4.16.4",
-    "sequelize": "^5.22.5",
+    "sequelize": "^6.29.0",
     "sequelize-typescript": "^1.0.0-alpha.9",
     "strong-error-handler": "^3.2.0"
   }