build(deps): Bump @google-cloud/functions-framework in /backend

Bumps [@google-cloud/functions-framework](https://github.com/GoogleCloudPlatform/functions-framework-nodejs) from 3.5.1 to 5.0.2.
- [Release notes](https://github.com/GoogleCloudPlatform/functions-framework-nodejs/releases)
- [Changelog](https://github.com/GoogleCloudPlatform/functions-framework-nodejs/blob/main/CHANGELOG.md)
- [Commits](GoogleCloudPlatform/functions-framework-nodejs@v3.5.1...v5.0.2)

---
updated-dependencies:
- dependency-name: "@google-cloud/functions-framework"
  dependency-version: 5.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

backend/package.json

@@ -14,7 +14,7 @@
   },
   "dependencies": {
     "@google-cloud/firestore": "^7.11.0",
-    "@google-cloud/functions-framework": "^3.4.6",
+    "@google-cloud/functions-framework": "^5.0.2",
     "@google-cloud/storage": "^7.16.0"
   }
 }