Bump @angular/language-service from 12.1.4 to 12.2.1 (#738)

Bumps [@angular/language-service](https://github.com/angular/angular/tree/HEAD/packages/language-service) from 12.1.4 to 12.2.1.
- [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/12.2.1/packages/language-service)

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

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Author: dependabot[bot]

package-lock.json

@@ -30,7 +30,7 @@
     "@angular-devkit/build-angular": "^12.2.1",
     "@angular/cli": "^12.1.4",
     "@angular/compiler-cli": "^12.2.1",
-    "@angular/language-service": "^12.1.4",
+    "@angular/language-service": "^12.2.1",
     "@angular/router": "^12.2.1",
     "@types/jasmine": "^3.8.2",
     "@types/jasminewd2": "^2.0.10",