Bump @angular/language-service from 9.0.3 to 9.0.4

Bumps [@angular/language-service](https://github.com/angular/angular/tree/HEAD/packages/language-service) from 9.0.3 to 9.0.4.
- [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/9.0.4/packages/language-service)

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

package.json

@@ -90,7 +90,7 @@
     "@angular-devkit/build-angular": "~0.900.3",
     "@angular/cli": "~9.0.3",
     "@angular/compiler-cli": "^9.0.1",
-    "@angular/language-service": "~9.0.3",
+    "@angular/language-service": "~9.0.4",
     "@types/ajv": "^1.0.0",
     "@types/lodash": "^4.14.149",
     "@types/node": "^13.7.6",