Bump @angular/compiler from 20.1.6 to 20.3.15

Bumps [@angular/compiler](https://github.com/angular/angular/tree/HEAD/packages/compiler) from 20.1.6 to 20.3.15.
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/20.3.15/packages/compiler)

---
updated-dependencies:
- dependency-name: "@angular/compiler"
  dependency-version: 20.3.15
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -19,7 +19,7 @@
   },
   "dependencies": {
     "@angular/common": "20.1.6",
-    "@angular/compiler": "20.1.6",
+    "@angular/compiler": "20.3.15",
     "@angular/core": "20.1.6",
     "@angular/platform-browser": "20.1.6",
     "@angular/router": "20.1.6",