Switch debbie to post job status on #postgis-activity instead of #postgis

[robe]

Per strk's request on:

​https://lists.osgeo.org/pipermail/postgis-devel/2015-October/025437.html

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FYI: I've registered a #postgis-activity IRC channel with Freenode and configured Travis to send messages there. Hadn't found any trace of IRC notification configuration for winnie or debbie under the ci/ directory of PostGIS source repo.

—strk;

On Thu, Oct 29, 2015 at 10:30:10AM +0100, Sandro Santilli wrote:

Would you be ok with moving the bots activity from #postgis to #postgis-activity ? I think the noise they make makes human talking harder otherwise…

—strk;

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[robe]

Milestone renamed