chore(deps-dev): bump the ember-core group in /ember with 2 updates

Bumps the ember-core group in /ember with 2 updates: [ember-cli](https://github.com/ember-cli/ember-cli) and [ember-source](https://github.com/emberjs/ember.js).


Updates `ember-cli` from 5.4.0 to 5.6.0
- [Release notes](https://github.com/ember-cli/ember-cli/releases)
- [Changelog](https://github.com/ember-cli/ember-cli/blob/master/CHANGELOG.md)
- [Commits](ember-cli/ember-cli@v5.4.0...v5.6.0)

Updates `ember-source` from 5.4.0 to 5.6.0
- [Release notes](https://github.com/emberjs/ember.js/releases)
- [Changelog](https://github.com/emberjs/ember.js/blob/main/CHANGELOG.md)
- [Commits](emberjs/ember.js@v5.4.0...v5.6.0)

---
updated-dependencies:
- dependency-name: ember-cli
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: ember-core
- dependency-name: ember-source
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: ember-core
...

Signed-off-by: dependabot[bot] <[email protected]>

ember/package.json

@@ -47,7 +47,7 @@
     "ember-auto-import": "^2.7.2",
     "ember-changeset": "^4.1.2",
     "ember-changeset-validations": "^4.1.1",
-    "ember-cli": "^5.4.0",
+    "ember-cli": "^5.6.0",
     "ember-cli-app-version": "^6.0.1",
     "ember-cli-babel": "^8.2.0",
     "ember-cli-clean-css": "^3.0.0",
@@ -73,7 +73,7 @@
     "ember-resolver": "^11.0.1",
     "ember-simple-auth": "^6.0.0",
     "ember-simple-auth-oidc": "^6.0.0",
-    "ember-source": "^5.4.0",
+    "ember-source": "^5.6.0",
     "ember-template-imports": "^4.0.0",
     "ember-template-lint": "^5.13.0",
     "ember-toggle": "^9.0.3",