Update dependency ember-cli to v6.4.0 (#11094)

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

Author: renovate[bot]

package.json

@@ -83,7 +83,7 @@
     "broccoli-funnel": "3.0.8",
     "ember-a11y-testing": "7.1.2",
     "ember-auto-import": "2.10.0",
-    "ember-cli": "6.3.1",
+    "ember-cli": "6.4.0",
     "ember-cli-babel": "8.2.0",
     "ember-cli-bundle-analyzer": "1.0.0",
     "ember-cli-code-coverage": "3.1.0",