Fix Redis Instance Object Type Definition

Magento is typically configured to use either Cm_Cache_Backend_Redis or
Magento\Framework\Cache\Backend\Redis as the 'backend' class for
handling Redis caching. The latter extends the former and this module
does not rely on the latter being use in order to perform its reporting.

Model/RedisInfo.php

@@ -7,6 +7,7 @@
 
 namespace Element119\AdminRedisReport\Model;
 
+use Cm_Cache_Backend_Redis;
 use Element119\AdminRedisReport\Api\Data\RedisReportInterface;
 use Element119\AdminRedisReport\Api\RedisReportRepositoryInterface;
 use Magento\Framework\App\CacheInterface;
@@ -19,10 +20,12 @@
 class RedisInfo implements ArgumentInterface
 {
     private CacheInterface $cache;
-    private Redis $redis;
     private DeploymentConfig $deploymentConfig;
     private ResourceConnection $resourceConnection;
 
+    /** @var Redis|Cm_Cache_Backend_Redis */
+    private $redis;
+
     public function __construct(
         CacheInterface $cache,
         DeploymentConfig $deploymentConfig,