Prepare Release using 'release-plan'

Author: github-actions[bot]

release-plan-stderr.txt

@@ -0,0 +1,7 @@
+# Unlabeled Changes
+
+* `eslint-plugin-ember`
+  * [#2723](https://github.com/ember-cli/eslint-plugin-ember/pull/2723) fix(template-no-invalid-aria-attributes): absorb allowundefined handling into validateByType ([@johanrd](https://github.com/johanrd))
+
+
+*Cannot plan release until the above changes are labeled*.