fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ANGULARCOMPILER-14157154

Author: snyk-bot

package.json

@@ -18,7 +18,7 @@
     "@angular/animations": "20.1.3",
     "@angular/cdk": "20.1.3",
     "@angular/common": "20.1.3",
-    "@angular/compiler": "20.1.3",
+    "@angular/compiler": "20.3.15",
     "@angular/core": "20.1.3",
     "@angular/forms": "20.1.3",
     "@angular/material": "20.1.3",