Build(deps): Bump ember-cli-htmlbars in /app/assets/javascripts (#23021)

Bumps [ember-cli-htmlbars](https://github.com/ember-cli/ember-cli-htmlbars) from 6.2.0 to 6.3.0.
- [Release notes](https://github.com/ember-cli/ember-cli-htmlbars/releases)
- [Changelog](https://github.com/ember-cli/ember-cli-htmlbars/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ember-cli/ember-cli-htmlbars/compare/v6.2.0...v6.3.0)

---
updated-dependencies:
- dependency-name: ember-cli-htmlbars
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

@@ -17,7 +17,7 @@
     "discourse-common": "1.0.0",
     "ember-auto-import": "^2.6.3",
     "ember-cli-babel": "^7.26.11",
-    "ember-cli-htmlbars": "^6.2.0",
+    "ember-cli-htmlbars": "^6.3.0",
     "ember-template-imports": "^3.4.2"
   },
   "devDependencies": {