[Tile-serving] [openstreetmap/osm2pgsql] Minor update to contributing info (#1223)

[mmd]

Closed #1223.

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/pull/1223#event-3559649337
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tile-serving/attachments/20200717/4e140626/attachment.htm>