Update dependency typescript to ~5.9.0 (#490)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

cdk/package.json

@@ -15,7 +15,7 @@
     "aws-cdk": "2.1023.0",
     "aws-cdk-github-oidc": "^2.4.1",
     "ts-node": "^10.9.2",
-    "typescript": "~5.8.0",
+    "typescript": "~5.9.0",
     "vitest": "^3.0.0",
     "@vitest/ui": "^3.0.0"
   },