Bump eslint-plugin-import from 2.30.0 to 2.31.0 in /backend

Bumps [eslint-plugin-import](https://github.com/import-js/eslint-plugin-import) from 2.30.0 to 2.31.0.
- [Release notes](https://github.com/import-js/eslint-plugin-import/releases)
- [Changelog](https://github.com/import-js/eslint-plugin-import/blob/main/CHANGELOG.md)
- [Commits](import-js/eslint-plugin-import@v2.30.0...v2.31.0)

---
updated-dependencies:
- dependency-name: eslint-plugin-import
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

backend/package-lock.json

@@ -34,7 +34,7 @@
   "devDependencies": {
     "eslint": "^8.57.1",
     "eslint-config-airbnb-base": "^15.0.0",
-    "eslint-plugin-import": "^2.30.0",
+    "eslint-plugin-import": "^2.31.0",
     "nodemon": "^3.1.7"
   }
 }