Fix SQLite error in UPDATE statement

[piggito]

UPDATE statements in SQLite require the AS keyword for table alias https://www.sqlite.org/lang_update.html so it was triggering an error like this

SQLSTATE[HY000]: General error: 1 near "s": syntax error: UPDATE {sessions} s SET expiration = :expiration, is_remember_me = :is_remember_me WHERE s.uid = :uid AND s.sid = :sid; Array ( [:expiration] => -1 [:is_remember_me] => 0 [:uid] => 11 [:sid] => 3uVNmhW-ekICbY9-b8wpvHQZMSl9MaV3syYsUS8XjA4 )

There isn't actually a need for table alias in this statement so I removed it to prevent errors

[Ynhockey]

Hi @piggito , sorry for the delay, I am starting to review your PRs now. I have opened a different PR to a different target branch, if you would like to open more PRs please target develop. Thanks!