chore(deps): bump @backstage/backend-defaults in /packages/backend (#82)

Bumps [@backstage/backend-defaults](https://github.com/backstage/backstage/tree/HEAD/packages/backend-defaults) from 0.5.3 to 0.7.0.
- [Release notes](https://github.com/backstage/backstage/releases)
- [Changelog](https://github.com/backstage/backstage/blob/master/packages/backend-defaults/CHANGELOG.md)
- [Commits](https://github.com/backstage/backstage/commits/v0.7.0/packages/backend-defaults)

---
updated-dependencies:
- dependency-name: "@backstage/backend-defaults"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

packages/backend/package.json

@@ -17,7 +17,7 @@
   },
   "dependencies": {
     "@backstage/backend-common": "^0.25.0",
-    "@backstage/backend-defaults": "^0.5.3",
+    "@backstage/backend-defaults": "^0.7.0",
     "@backstage/backend-tasks": "^0.6.1",
     "@backstage/config": "^1.3.0",
     "@backstage/plugin-app-backend": "^0.4.2",