Merge pull request #21432 from NullVoxPopuli-ai-agent/nvp/update-testem

Override testem to 3.20.1 so ember-cli also picks up the dotfiles fix

Author: NullVoxPopuli

package.json

@@ -151,7 +151,8 @@
       "rollup": "^4.2.0",
       "ember-cli-htmlbars": "^7.0.0",
       "babel-plugin-ember-template-compilation": "^4.0.0",
-      "ember-cli-babel": "^8.3.1"
+      "ember-cli-babel": "^8.3.1",
+      "testem": "^3.20.1"
     },
     "onlyBuiltDependencies": [
       "@swc/core",