chore(deps): bump django in /packages/python/examples/metrics_django

Bumps [django](https://github.com/django/django) from 4.2.18 to 4.2.20.
- [Commits](django/django@4.2.18...4.2.20)

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

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

Author: dependabot[bot]

packages/python/examples/metrics_django/requirements.txt

@@ -2,7 +2,7 @@ asgiref==3.8.1
 certifi==2024.7.4
 chardet==5.2.0
 click==8.1.7
-Django==4.2.18
+Django==4.2.20
 Flask==3.0.3
 idna==3.7
 itsdangerous==2.2.0