chore(deps): update dependency concurrently to v9

Author: renovate[bot]

package.json

@@ -15,7 +15,7 @@
     "test:ember": "pnpm --filter '*' test:ember"
   },
   "devDependencies": {
-    "concurrently": "8.2.2",
+    "concurrently": "9.1.0",
     "documentation": "14.0.3",
     "eslint": "8.57.1",
     "prettier": "2.8.8",

packages/qunit-dom/package.json

@@ -46,7 +46,7 @@
     "@vitest/coverage-v8": "2.0.5",
     "babel-plugin-transform-es2015-modules-commonjs": "6.26.2",
     "babel-preset-env": "1.7.0",
-    "concurrently": "8.2.2",
+    "concurrently": "9.1.0",
     "eslint": "8.57.1",
     "eslint-config-prettier": "9.1.0",
     "eslint-plugin-prettier": "5.2.1",

packages/test-app/package.json

@@ -65,7 +65,7 @@
     "babel-plugin-transform-es2015-modules-commonjs": "6.26.2",
     "babel-preset-env": "1.7.0",
     "broccoli-asset-rev": "3.0.0",
-    "concurrently": "8.2.2",
+    "concurrently": "9.1.0",
     "documentation": "14.0.3",
     "ember-auto-import": "2.7.4",
     "ember-cli": "4.12.3",