Bump @embroider/addon-dev from 7.1.5 to 8.1.0

Bumps [@embroider/addon-dev](https://github.com/embroider-build/embroider/tree/HEAD/packages/addon-dev) from 7.1.5 to 8.1.0.
- [Release notes](https://github.com/embroider-build/embroider/releases)
- [Changelog](https://github.com/embroider-build/embroider/blob/main/CHANGELOG.md)
- [Commits](https://github.com/embroider-build/embroider/commits/HEAD/packages/addon-dev)

---
updated-dependencies:
- dependency-name: "@embroider/addon-dev"
  dependency-version: 8.1.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

ember-power-calendar/package.json

@@ -76,7 +76,7 @@
     "@babel/eslint-parser": "^7.27.1",
     "@babel/plugin-transform-typescript": "^7.27.1",
     "@babel/runtime": "^7.27.1",
-    "@embroider/addon-dev": "^7.1.1",
+    "@embroider/addon-dev": "^8.1.0",
     "@ember/library-tsconfig": "^1.1.3",
     "@ember/test-helpers": "^5.2.2",
     "@eslint/js": "^9.26.0",