Build(deps): Bump ember-source in /app/assets/javascripts (#19265)

Bumps [ember-source](https://github.com/emberjs/ember.js) from 3.28.10 to 3.28.11.
- [Release notes](https://github.com/emberjs/ember.js/releases)
- [Changelog](https://github.com/emberjs/ember.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/emberjs/ember.js/compare/v3.28.10...v3.28.11)

---
updated-dependencies:
- dependency-name: ember-source
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

app/assets/javascripts/admin/package.json

@@ -35,7 +35,7 @@
     "ember-disable-prototype-extensions": "^1.1.3",
     "ember-load-initializers": "^2.1.1",
     "ember-resolver": "^8.0.3",
-    "ember-source": "~3.28.10",
+    "ember-source": "~3.28.11",
     "ember-source-channel-url": "^3.0.0",
     "loader.js": "^4.7.0"
   },