fix(redis): Require version >=4 for unlink

Signed-off-by: Git'Fellow <12234510+solracsf@users.noreply.github.com>

lib/private/RedisFactory.php

@@ -10,7 +10,7 @@ namespace OC;
 use OCP\Diagnostics\IEventLogger;
 
 class RedisFactory {
-	public const REDIS_MINIMAL_VERSION = '3.1.3';
+	public const REDIS_MINIMAL_VERSION = '4.0.0';
 	public const REDIS_EXTRA_PARAMETERS_MINIMAL_VERSION = '5.3.0';
 
 	/** @var  \Redis|\RedisCluster */