Update dependency concurrently to v9

Author: renovate[bot]

package.json

@@ -37,7 +37,7 @@
     "@release-it-plugins/lerna-changelog": "5.0.0",
     "@babel/eslint-parser": "7.28.6",
     "broccoli-asset-rev": "3.0.0",
-    "concurrently": "8.2.2",
+    "concurrently": "9.2.1",
     "ember-auto-import": "2.12.0",
     "ember-cli": "5.12.0",
     "ember-cli-dependency-checker": "3.3.3",