Resolve build workflow failure by aligning TypeScript with Astro peer constraints

[Copilot]

The build GitHub Actions job failed at npm ci due to an unsatisfied peer dependency: @astrojs/check@0.9.10 does not support TypeScript 7. This change restores install/build compatibility by pinning TypeScript to a supported major.

• Root cause addressed

  • @astrojs/check@0.9.10 requires typescript: ^5 || ^6, while the repo declared typescript: ^7.0.2.

• Dependency alignment

  • Updated devDependencies.typescript from ^7.0.2 to ^6.0.3 in package.json.
  • Regenerated package-lock.json to capture the resolved graph under the supported TypeScript major.

• Scope

  • No workflow logic or app/source behavior changes; this is a dependency-resolution fix for CI install failure.

{
  "devDependencies": {
    "@astrojs/check": "^0.9.10",
    "typescript": "^6.0.3"
  }
}