fix a spelling error

REMOVE "Note: synchronous replication between vnodes is only supported in Enterprise Edition"

* [TD-4752]<doc>: python connector supports nanoseconds.

* update english document too.

update index.md

update title of cluster.md

Update architecture.md

update administrator.md

update connector.md

update model.md

add 03.architecture

Update taos-sql.md

Update insert.md

Update getting-started.md

update evaluation.md