fix: packages/stark-testing/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-VITE-9653016
- https://snyk.io/vuln/SNYK-JS-VITE-9576207

Author: snyk-bot

packages/stark-testing/package.json

@@ -20,7 +20,7 @@
     "npm": ">=10.1.0"
   },
   "dependencies": {
-    "@angular-devkit/build-angular": "^16.2.16",
+    "@angular-devkit/build-angular": "^18.2.14",
     "@types/jasmine": "~5.1.5",
     "@types/karma": "^6.3.8",
     "@types/node": "^18.19.4",