Описать изменение формата версии плагинов

Picodata follow-up

• Follow-up for picodata!1523
• See also picodata#1225
• Doc pages to change:
  • https://docs.picodata.io/picodata/stable/reference/sql/ddl/
  • https://docs.picodata.io/picodata/stable/reference/sql/alter_plugin/
  • https://docs.picodata.io/picodata/stable/reference/sql/create_plugin/
  • https://docs.picodata.io/picodata/stable/reference/sql/drop_plugin/