Bump ember-cli from 5.12.0 to 6.3.1

Bumps [ember-cli](https://github.com/ember-cli/ember-cli) from 5.12.0 to 6.3.1.
- [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@v5.12.0...v6.3.1)

---
updated-dependencies:
- dependency-name: ember-cli
  dependency-version: 6.3.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -54,7 +54,7 @@
     "chai-as-promised": "^8.0.1",
     "codecov": "^3.8.3",
     "concurrently": "^9.1.0",
-    "ember-cli": "~5.12.0",
+    "ember-cli": "~6.3.1",
     "eslint": "^8.57.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-n": "^17.15.0",