Bump django from 4.2.17 to 4.2.18 in /src/backend

Bumps [django](https://github.com/django/django) from 4.2.17 to 4.2.18.
- [Commits](django/django@4.2.17...4.2.18)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/backend/requirements.txt

@@ -3,7 +3,7 @@ blinker==1.6.2
 certifi==2024.7.4
 charset-normalizer==3.1.0
 click==8.1.3
-Django==4.2.17
+Django==4.2.18
 Flask==2.3.2
 idna==3.7
 image==1.5.33