[Phpmyadmin-translators] change of one message for 2.5.5

[Marc Delisle]

Hi,

The message strUpgradeMySQL is gone, and the new message now is:

$strUpgrade = 'You should upgrade to %s %s or later.';

The first parameter is the product and the second one is the version.
For example:   MySQL   3.23.x

I changed all the message files. If you sent recently a file
in the translation tracker, please adjust this file to include
the new message and resubmit. Thanks.

Marc Delisle