build(deps-dev): bump @ember/string from 3.1.1 to 4.0.0

Bumps [@ember/string](https://github.com/emberjs/ember-string) from 3.1.1 to 4.0.0.
- [Release notes](https://github.com/emberjs/ember-string/releases)
- [Changelog](https://github.com/emberjs/ember-string/blob/master/CHANGELOG.md)
- [Commits](https://github.com/emberjs/ember-string/commits)

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

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

test-app/package.json

@@ -28,7 +28,7 @@
   "devDependencies": {
     "@babel/core": "^7.26.0",
     "@ember/optional-features": "^2.2.0",
-    "@ember/string": "^3.1.1",
+    "@ember/string": "^4.0.0",
     "@ember/test-helpers": "^3.3.0",
     "@embroider/test-setup": "^4.0.0",
     "@glimmer/component": "^1.1.2",

yarn.lock

@@ -1100,12 +1100,10 @@
     mkdirp "^1.0.4"
     silent-error "^1.1.1"
 
-"@ember/string@^3.1.1":
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/@ember/string/-/string-3.1.1.tgz#0a5ac0d1e4925259e41d5c8d55ef616117d47ff0"
-  integrity sha512-UbXJ+k3QOrYN4SRPHgXCqYIJ+yWWUg1+vr0H4DhdQPTy8LJfyqwZ2tc5uqpSSnEXE+/1KopHBE5J8GDagAg5cg==
-  dependencies:
-    ember-cli-babel "^7.26.6"
+"@ember/string@^4.0.0":
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/@ember/string/-/string-4.0.0.tgz#24fe5cda227c9e6634e6e0b550944a3a13437878"
+  integrity sha512-IMVyVE72twuAMSYcHzWSgtgYTtzlHlKSGW8vEbztnnmkU6uo7kVHmiqSN9R4RkBhzvh0VD4G76Eph+55t3iNIA==
 
 "@ember/test-helpers@^3.3.0":
   version "3.3.0"