Bump django from 2.2.5 to 2.2.8 in /CodeBust/Flask-Backend

Bumps [django](https://github.com/django/django) from 2.2.5 to 2.2.8.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@2.2.5...2.2.8)

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

CodeBust/Flask-Backend/requirements.txt

@@ -45,7 +45,7 @@ decorator==4.4.0
 defusedxml==0.6.0
 distributed==2.5.2
 dj-database-url==0.5.0
-Django==2.2.5
+Django==2.2.8
 django-admin==2.0.0
 django-ckeditor==5.5.0
 django-excel-response2==2.0.8