Bump @angular/core from 8.2.12 to 11.0.5 in /zeppelin-web-angular

Bumps [@angular/core](https://github.com/angular/angular/tree/HEAD/packages/core) from 8.2.12 to 11.0.5.
- [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/11.0.5/packages/core)

---
updated-dependencies:
- dependency-name: "@angular/core"
  dependency-type: direct:production
...

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

zeppelin-web-angular/package.json

@@ -21,7 +21,7 @@
     "@angular/cdk": "~8.2.3",
     "@angular/common": "~8.2.10",
     "@angular/compiler": "~8.2.10",
-    "@angular/core": "~8.2.10",
+    "@angular/core": "~11.0.5",
     "@angular/forms": "~8.2.10",
     "@angular/platform-browser": "~8.2.10",
     "@angular/platform-browser-dynamic": "~8.2.10",