Update dependency @babel/plugin-proposal-decorators to v7.20.13 (#5970)

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

Author: renovate[bot]

package.json

@@ -53,7 +53,7 @@
   },
   "devDependencies": {
     "@babel/eslint-parser": "7.19.1",
-    "@babel/plugin-proposal-decorators": "7.20.7",
+    "@babel/plugin-proposal-decorators": "7.20.13",
     "@ember/optional-features": "2.0.0",
     "@ember/render-modifiers": "2.0.5",
     "@ember/test-helpers": "2.9.3",