package/redis: security bump to v7.0.4

From the release notes:

================================================================================
Redis 7.0.4 Released Monday Jul 18 12:00:00 IST 2022
================================================================================

Upgrade urgency: SECURITY, contains fixes to security issues.

Security Fixes:
* (CVE-2022-31144) A specially crafted XAUTOCLAIM command on a stream
  key in a specific state may result with heap overflow, and potentially
  remote code execution. The problem affects Redis versions 7.0.0 or newer.

Signed-off-by: Titouan Christophe <titouanchristophe@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>