chore(deps-dev): bump @angular/language-service in /frontend

Bumps [@angular/language-service](https://github.com/angular/angular/tree/HEAD/packages/language-service) from 12.2.16 to 13.2.6.
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/master/docs/RELEASE_SCHEDULE.md)
- [Commits](https://github.com/angular/angular/commits/13.2.6/packages/language-service)

---
updated-dependencies:
- dependency-name: "@angular/language-service"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

frontend/package.json

@@ -30,7 +30,7 @@
     "chart.js": "^3.6.0",
     "core-js": "^3.19.0",
     "jwt-decode": "^3.1.2",
-    "ngx-markdown": "^12.0.1",
+    "ngx-markdown": "^13.1.0",
     "primeflex": "^3.1.0",
     "primeicons": "^4.1.0",
     "primeng": "^12.2.1",
@@ -39,7 +39,7 @@
     "zone.js": "~0.11.4"
   },
   "devDependencies": {
-    "@angular/language-service": "~12.2.11",
+    "@angular/language-service": "~13.2.6",
     "@types/jasmine": "~3.10.1",
     "@types/jasminewd2": "^2.0.10",
     "@types/node": "^17.0.21",