Update dependency ember-power-select to v8.12.0

Author: renovate[bot]

package.json

@@ -68,7 +68,7 @@
     "ember-concurrency": "5.1.0",
     "ember-load-initializers": "3.0.1",
     "ember-page-title": "9.0.3",
-    "ember-power-select": "8.11.0",
+    "ember-power-select": "8.12.0",
     "ember-qunit": "9.0.4",
     "ember-resolver": "13.1.1",
     "ember-source": "6.8.1",