build(deps): bump python from 3.11 to 3.12 in /Django

Bumps python from 3.11 to 3.12.

---
updated-dependencies:
- dependency-name: python
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Django/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.11
+FROM python:3.12
 
 # 作業ディレクトリを設定
 WORKDIR /usr/src/app