Update dependency eslint to v9 (#1188)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -81,7 +81,7 @@
     "ember-source-channel-url": "3.0.0",
     "ember-template-lint": "7.0.0",
     "ember-try": "3.0.0",
-    "eslint": "8.57.1",
+    "eslint": "9.21.0",
     "eslint-config-prettier": "10.0.2",
     "eslint-plugin-ember": "11.12.0",
     "eslint-plugin-n": "17.16.1",