Bump ts-jest from 29.3.1 to 29.3.4 in /frontend

Bumps [ts-jest](https://github.com/kulshekhar/ts-jest) from 29.3.1 to 29.3.4.
- [Release notes](https://github.com/kulshekhar/ts-jest/releases)
- [Changelog](https://github.com/kulshekhar/ts-jest/blob/main/CHANGELOG.md)
- [Commits](https://github.com/kulshekhar/ts-jest/compare/v29.3.1...v29.3.4)

---
updated-dependencies:
- dependency-name: ts-jest
  dependency-version: 29.3.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

frontend/sync-client/package.json

@@ -24,7 +24,7 @@
         "@types/node": "^22.14.0",
         "jest": "^29.7.0",
         "sync_lib": "file:../../backend/sync_lib/pkg",
-        "ts-jest": "^29.3.1",
+        "ts-jest": "^29.3.4",
         "ts-loader": "^9.5.2",
         "tslib": "2.8.1",
         "typescript": "5.8.2",