fix: samples/client/petstore/typescript-angular-v15-provided-in-root/package.json & samples/client/petstore/typescript-angular-v15-provided-in-root/package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ANGULARCOMPILER-14908872
- https://snyk.io/vuln/SNYK-JS-ANGULARCORE-14908871

Author: snyk-bot

samples/client/petstore/typescript-angular-v15-provided-in-root/package-lock.json

@@ -13,8 +13,8 @@
   "dependencies": {
     "@angular/animations": "^15.0.3",
     "@angular/common": "^15.0.3",
-    "@angular/compiler": "^15.0.3",
-    "@angular/core": "^15.0.3",
+    "@angular/compiler": "^19.2.18",
+    "@angular/core": "^19.2.18",
     "@angular/forms": "^15.0.3",
     "@angular/platform-browser": "^15.0.3",
     "@angular/platform-browser-dynamic": "^15.0.3",