Bump redis from 3.2.0 to 3.5.3 in /cvat/requirements (#1741)

Bumps [redis](https://github.com/andymccurdy/redis-py) from 3.2.0 to 3.5.3.
- [Release notes](https://github.com/andymccurdy/redis-py/releases)
- [Changelog](https://github.com/andymccurdy/redis-py/blob/master/CHANGES)
- [Commits](https://github.com/andymccurdy/redis-py/compare/3.2.0...3.5.3)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

cvat/requirements/base.txt

@@ -12,7 +12,7 @@ python-ldap==3.2.0
 pytz==2020.1
 pyunpack==0.2.1
 rcssmin==1.0.6
-redis==3.2.0
+redis==3.5.3
 rjsmin==1.1.0
 requests==2.24.0
 rq==1.0.0