changed a hard coded class string to be dynamic

src/SchemaBuilder/SchemaBuilder.php

@@ -85,7 +85,7 @@ class SchemaBuilder
 
             foreach ($property->getAttributes() as $attribute)
             {
-                if($attribute->getName() != "Darksparrow\AuxiliumSchemaBuilder\Attributes\SchemaDocumentField")
+                if($attribute->getName() != SchemaDocumentField::class)
                     continue;
 
                 foreach($attribute->getArguments() as $key=>$value)