Bump multer from 1.4.5-lts.2 to 2.0.0 in /src/server

Bumps [multer](https://github.com/expressjs/multer) from 1.4.5-lts.2 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.2...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>

src/server/package.json

@@ -15,7 +15,7 @@
         "express": "^4.21.2",
         "express-session": "^1.18.1",
         "html-to-text": "^9.0.5",
-        "multer": "^1.4.5-lts.1",
+        "multer": "^2.0.0",
         "mysql": "^2.18.1",
         "nodemailer": "^6.10.1",
         "pdf-lib": "^1.17.1",