chore(deps-dev): bump @ember/string from 3.1.1 to 4.0.1

Bumps [@ember/string](https://github.com/emberjs/ember-string) from 3.1.1 to 4.0.1.
- [Release notes](https://github.com/emberjs/ember-string/releases)
- [Changelog](https://github.com/emberjs/ember-string/blob/main/CHANGELOG.md)
- [Commits](https://github.com/emberjs/ember-string/commits)

---
updated-dependencies:
- dependency-name: "@ember/string"
  dependency-version: 4.0.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -56,7 +56,7 @@
     "@commitlint/cli": "20.1.0",
     "@commitlint/config-conventional": "20.0.0",
     "@ember/optional-features": "2.2.0",
-    "@ember/string": "3.1.1",
+    "@ember/string": "4.0.1",
     "@ember/test-helpers": "4.0.4",
     "@embroider/macros": "1.18.2",
     "@embroider/test-setup": "4.0.0",