Update dependency ember-bootstrap to v6.6.1

Author: renovate[bot]

package.json

@@ -56,7 +56,7 @@
     "broccoli-asset-rev": "3.0.0",
     "concurrently": "9.2.1",
     "ember-auto-import": "2.11.2",
-    "ember-bootstrap": "6.5.0",
+    "ember-bootstrap": "6.6.1",
     "ember-changeset": "5.0.0",
     "ember-changeset-validations": "5.0.0",
     "ember-cli": "6.8.0",