chore(deps): bump ember-cli-htmlbars from 5.6.2 to 5.6.3

Bumps [ember-cli-htmlbars](https://github.com/ember-cli/ember-cli-htmlbars) from 5.6.2 to 5.6.3.
- [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](ember-cli/ember-cli-htmlbars@v5.6.2...v5.6.3)

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

packages/ember-engine-router-service/package.json

@@ -29,7 +29,7 @@
   },
   "dependencies": {
     "ember-cli-babel": "^7.24.0",
-    "ember-cli-htmlbars": "^5.6.2",
+    "ember-cli-htmlbars": "^5.6.3",
     "ember-cli-typescript": "^4.1.0"
   },
   "devDependencies": {