Update adapter examples documentation

[GeeH]

https://github.com/zendframework/zend-db/blob/master/doc/book/adapter.md#examples

Needs updating, the example:

$sql = 'UPDATE ' . $qi('artist')
    . ' SET ' . $qi('name') . ' = ' . $fp('name')
    . ' WHERE ' . $qi('id') . ' = ' . $fp('id');

$statement = $adapter->query($sql);

$parameters = [
    'name' => 'Updated Artist',
    'id'   => 1,
];

$statement->execute($parameters);

Is wrong because the $adapter->query() method returns a Result object not a statement - please check all examples and fix accordingly.

Thanks in advance!

[michalbundyra]

This repository has been closed and moved to laminas/laminas-db; a new issue has been opened at laminas/laminas-db#69.