fix missing @ember/string dependency

Author: Gaurav0

package.json

@@ -51,6 +51,7 @@
   },
   "dependencies": {
     "@ember/render-modifiers": "^2.0.0",
+    "@ember/string": "^3.0.1",
     "@embroider/macros": "^1.8.3",
     "@embroider/util": "^1.10.0",
     "@glimmer/component": "^1.0.4",

yarn.lock

@@ -1048,6 +1048,13 @@
     ember-cli-babel "^7.26.11"
     ember-modifier-manager-polyfill "^1.2.0"
 
+"@ember/string@^3.0.1":
+  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/test-helpers@^2.6.0":
   version "2.9.4"
   resolved "https://registry.yarnpkg.com/@ember/test-helpers/-/test-helpers-2.9.4.tgz#985022e9ba05cfc918bcf08b77cbb355f85b723e"