Bump django from 2.2.13 to 2.2.24 in /Learn Django/hello_world

Bumps [django](https://github.com/django/django) from 2.2.13 to 2.2.24.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@2.2.13...2.2.24)

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

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

Author: dependabot[bot]

Learn Django/hello_world/requirements.txt

@@ -1,4 +1,4 @@
-Django==2.2.13
+Django==2.2.24
 pkg-resources==0.0.0
 pytz==2019.3
 sqlparse==0.3.0