Update redis requirement from ~=5.0.1 to ~=5.0.3 in /app

Updates the requirements on [redis](https://github.com/redis/redis-py) to permit the latest version.
- [Release notes](https://github.com/redis/redis-py/releases)
- [Changelog](https://github.com/redis/redis-py/blob/master/CHANGES)
- [Commits](redis/redis-py@v5.0.1...v5.0.3)

---
updated-dependencies:
- dependency-name: redis
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

app/requirements.txt

@@ -1,4 +1,4 @@
 requests~=2.31.0
-redis~=5.0.1
+redis~=5.0.3
 flask~=3.0.0
 gunicorn~=21.2.0