Bump python-slugify from 4.0.1 to 5.0.0

Bumps [python-slugify](https://github.com/un33k/python-slugify) from 4.0.1 to 5.0.0.
- [Release notes](https://github.com/un33k/python-slugify/releases)
- [Changelog](https://github.com/un33k/python-slugify/blob/master/CHANGELOG.md)
- [Commits](https://github.com/un33k/python-slugify/compare/4.0.1...5.0.0)

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

requirements.txt

@@ -3,7 +3,7 @@ Django==3.2
 pytz==2021.1
 sqlparse==0.4.1
 requests==2.25.1
-python-slugify==4.0.1
+python-slugify==5.0.0
 validators==0.18.2
 python-memcached==1.59
 password_strength==0.0.3.post2