Bump typescript from 5.6.3 to 5.7.3 in /apps/webrtc-demo

Bumps [typescript](https://github.com/microsoft/TypeScript) from 5.6.3 to 5.7.3.
- [Release notes](https://github.com/microsoft/TypeScript/releases)
- [Changelog](https://github.com/microsoft/TypeScript/blob/main/azure-pipelines.release.yml)
- [Commits](microsoft/TypeScript@v5.6.3...v5.7.3)

---
updated-dependencies:
- dependency-name: typescript
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

apps/webrtc-demo/package.json

@@ -24,7 +24,7 @@
     "@vue/tsconfig": "^0.6.0",
     "oxlint": "^0.15.3",
     "prettier": "^3.2.5",
-    "typescript": "~5.6.3",
+    "typescript": "~5.7.3",
     "vite": "^6.0.11",
     "vue-tsc": "^2.2.0"
   }