fix: upgrade typescript from 5.8.3 to 5.9.3

Snyk has created this PR to upgrade typescript from 5.8.3 to 5.9.3.

See this package in npm:
typescript

See this project in Snyk:
https://app.snyk.io/org/gsa-poc-group-default/project/f67d923d-966e-498c-ad83-dceaf06b02b3?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

spiffworkflow-frontend/package.json

@@ -51,7 +51,7 @@
     "react-router": "^6.24.1",
     "react-router-dom": "^6.25.1",
     "rxjs": "^7.8.1",
-    "typescript": "^5.0.0",
+    "typescript": "^5.9.3",
     "use-debounce": "^10.0.1",
     "vite": "^7.1.3",
     "vite-plugin-svgr": "^4.3.0",