Update README.md

Добавляем атрибут charset к script src.

Добавляем атрибут charset к <script src=...>, иначе кириллица сломается при подключении скрипта к странице с кодировкой, отличной от юникода.
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins
update statistics files for plugins