Bump typescript from 5.9.3 to 6.0.3 in /src/vscode-bicep

Bumps [typescript](https://github.com/microsoft/TypeScript) from 5.9.3 to 6.0.3.
- [Release notes](https://github.com/microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v5.9.3...v6.0.3)

---
updated-dependencies:
- dependency-name: typescript
  dependency-version: 6.0.3
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

src/vscode-bicep/package-lock.json

@@ -779,7 +779,7 @@
     "terser-webpack-plugin": "^5.5.0",
     "ts-jest": "^29.4.6",
     "ts-node": "^10.9.2",
-    "typescript": "^5.7.3",
+    "typescript": "^6.0.3",
     "typescript-eslint": "^8.28.0",
     "webpack": "^5.105.2",
     "webpack-cli": "^7.0.3"