Update dependency ember-cli-deprecation-workflow to v4

Author: renovate[bot]

package.json

@@ -61,7 +61,7 @@
     "ember-cli-blueprint-test-helpers": "0.19.2",
     "ember-cli-clean-css": "3.0.0",
     "ember-cli-dependency-checker": "3.3.3",
-    "ember-cli-deprecation-workflow": "3.4.0",
+    "ember-cli-deprecation-workflow": "4.0.1",
     "ember-cli-inject-live-reload": "2.1.0",
     "ember-cli-sri": "2.1.1",
     "ember-cli-terser": "4.0.2",