[Marketing] Co-hosting Qt Contributor Days at Akademy conference

[Michael Hasselmann]

Hi,

with the Qt Dev Days now being in Berlin, it's only fair to move the
contributor summit elsewhere. We had two great summits here and I would
probably help with the third one again. However, Bilbao might be cheaper
overall? Especially if it safes one flight from/to Berlin/Bilbao.

However, 10+ days of conferencing is tough. So try to leave at least the
weekend between the conferences.

regards,
Michael