build: bump typescript from 5.8.2 to 5.8.3 in /src/App

Bumps [typescript](https://github.com/microsoft/TypeScript) from 5.8.2 to 5.8.3.
- [Release notes](https://github.com/microsoft/TypeScript/releases)
- [Changelog](https://github.com/microsoft/TypeScript/blob/main/azure-pipelines.release-publish.yml)
- [Commits](microsoft/TypeScript@v5.8.2...v5.8.3)

---
updated-dependencies:
- dependency-name: typescript
  dependency-version: 5.8.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]