fix description of configuration max.data.migration.wait.time (#6749)

Co-authored-by: Gabriel Ortiga Fernandes <gabriel.fernandes@scclouds.com.br>

Author: GaOrtiga

engine/components-api/src/main/java/com/cloud/storage/StorageManager.java

@@ -147,7 +147,7 @@ public interface StorageManager extends StorageService {
             "Setting this to 'true' will auto scale down SSVMs", true, ConfigKey.Scope.Global);
 
     ConfigKey<Integer> MaxDataMigrationWaitTime = new ConfigKey<Integer>("Advanced", Integer.class, "max.data.migration.wait.time", "15",
-            "Maximum wait time for a data migration task before spawning a new SSVM", false, ConfigKey.Scope.Global);
+            "Maximum wait time (in minutes) for a data migration task before spawning a new SSVM", false, ConfigKey.Scope.Global);
     ConfigKey<Boolean> DiskProvisioningStrictness = new ConfigKey<Boolean>("Storage", Boolean.class, "disk.provisioning.type.strictness", "false",
             "If set to true, the disk is created only when there is a suitable storage pool that supports the disk provisioning type specified by the service/disk offering. " +
                     "If set to false, the disk is created with a disk provisioning type supported by the pool. Default value is false, and this is currently supported for VMware only.",