build(deps): bump multer from 1.4.5-lts.1 to 2.0.0

Bumps [multer](https://github.com/expressjs/multer) from 1.4.5-lts.1 to 2.0.0.
- [Release notes](https://github.com/expressjs/multer/releases)
- [Changelog](https://github.com/expressjs/multer/blob/main/CHANGELOG.md)
- [Commits](https://github.com/expressjs/multer/compare/v1.4.5-lts.1...v2.0.0)

---
updated-dependencies:
- dependency-name: multer
  dependency-version: 2.0.0
  dependency-type: direct:production
...

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

backend/package.json

@@ -53,7 +53,7 @@
     "last-commit-log": "^2.1.0",
     "lodash-es": "^4.17.21",
     "moment-timezone": "^0.5.21",
-    "multer": "^1.4.5-lts.1",
+    "multer": "^2.0.0",
     "mysql2": "^3.9.8",
     "parse-color": "^1.0.0",
     "passport": "^0.6.0",