fix: examples/custom-webpack/sanity-app/package.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-io[bot]

examples/custom-webpack/sanity-app/package.json

@@ -14,8 +14,8 @@
   "dependencies": {
     "@angular/animations": "18.0.6",
     "@angular/common": "18.0.6",
-    "@angular/compiler": "18.0.6",
-    "@angular/core": "18.0.6",
+    "@angular/compiler": "19.2.18",
+    "@angular/core": "19.2.18",
     "@angular/forms": "18.0.6",
     "@angular/platform-browser": "18.0.6",
     "@angular/platform-browser-dynamic": "18.0.6",