Update translate-group-desc-tsint message

Was pointing at http://toolserver.org/~krinkle still. The tool
has been moved to http://toolserver.org/~intuition.

Linking to [[Translating:Toolserver]] instead. Link to
technical documentation and the intuition dashboard can be found
there instead (the other message group descriptions did't contain
this many links either).

Change-Id: Icf48cf830fbfb91edcde0cac8446e6061bde47b6