Update readme

Author: thyyppa

readme.md

@@ -240,7 +240,8 @@ FluentFM::download( <layout>, <field>, [output_dir], [recordId] )
 ->sortDesc( <field> )
 ->withPortals()
 ->withoutPortals()
-->where( <field>, <params> )
+->where( <field>, <params> ) // multiple calls act as "and"
+->orWhere( <field>, <params> )
 ->whereEmpty( <field> )
 ->has( <field> )
 ->whereNotEmpty( <field> )