Bump django from 2.1.8 to 2.2.10 in /run

Bumps [django](https://github.com/django/django) from 2.1.8 to 2.2.10.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@2.1.8...2.2.10)

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

run/requirements.txt

@@ -1,4 +1,4 @@
-Django==2.1.8
+Django==2.2.10
 django-markdownx==3.0.1
 Markdown==3.2.1
 Pillow==7.1.1