Merge pull request #771 from codethesaurus/dependabot/pip/django-4.2.21

Bump django from 4.2.20 to 4.2.21

Author: geekygirlsarah

requirements.txt

@@ -5,7 +5,7 @@ bleach==6.1.0
 colorama==0.4.6
 dill==0.3.7
 dj-database-url==2.1.0
-Django==4.2.20
+Django==4.2.21
 django-markdownify==0.9.3
 django-on-heroku==1.1.2
 gunicorn==23.0.0