[BUGFIX] Set correct type hint for install tool database check

With this change the wrong introduced type hint will be changed and
enriched with some detail information.

Resolves: #90223
Releases: master
Change-Id: I3437889fb355571c88f1902b217faf11d56dd158
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63052


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Alexander Schnitzler <git@alexanderschnitzler.de>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Alexander Schnitzler <git@alexanderschnitzler.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>

typo3/sysext/install/Classes/SystemEnvironment/DatabaseCheck.php

@@ -94,6 +94,9 @@ class DatabaseCheck implements CheckInterface
         TYPO3PDOSqliteDriver::class => DatabaseCheckPlatformSqlite::class,
     ];
 
+    /**
+     * @var string[]
+     */
     private static $driverMap = [
         'pdo_mysql' => TYPO3PDOMySqlDriver::class,
         'pdo_sqlite' => TYPO3PDOSqliteDriver::class,
@@ -109,7 +112,9 @@ class DatabaseCheck implements CheckInterface
     ];
 
     /**
-     * @var CheckInterface[]
+     * List of database driver to check
+     *
+     * @var string[]
      */
     private $databaseDriverCheckMap = [
         DoctrineMysqliDriver::class => DatabaseCheckDriverMysqli::class,