Bump @angular/language-service from 10.0.8 to 10.0.9 in /frontend

Bumps [@angular/language-service](https://github.com/angular/angular/tree/HEAD/packages/language-service) from 10.0.8 to 10.0.9.
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/master/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/10.0.9/packages/language-service)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

frontend/package-lock.json

@@ -38,7 +38,7 @@
     "@angular-devkit/build-angular": "^0.901.12",
     "@angular/cli": "^9.1.11",
     "@angular/compiler-cli": "^9.0.7",
-    "@angular/language-service": "^10.0.8",
+    "@angular/language-service": "^10.0.9",
     "@types/jasmine": "~3.5.12",
     "@types/jasminewd2": "~2.0.8",
     "@types/node": "~14.0.27",