Update DbAcl.php - Changed objects from private to protected

To solve the issue when using CachedDB adapter.

Author: 1DL

src/Adapter/DbAcl.php

@@ -43,9 +43,9 @@
  */
 class DbAcl implements AclInterface
 {
-    private PermissionsTable $Permission;
-    private ArosTable $Aro;
-    private AcosTable $Aco;
+    protected PermissionsTable $Permission;
+    protected ArosTable $Aro;
+    protected AcosTable $Aco;
 
     /**
      * Constructor