Update date for PolyCloud

[GridexX]

Hello @rverchere, thanks for sharing the PolyCloud Conference
I'm a student at Polytech Montpellier and currently working at r2devop !

This year the conference will be on Sunday 27th mai, as mentionned on the new version of the site:https://polycloud.fr/

[GridexX]

By the way, the CFP is open: https://conference-hall.io/public/event/OR1ldOA5G0ASoizWvVbO
We will soon release a new version of the site with all information 😄

[rverchere]

Oh, sorry for the mistake, I'll update it!

Edit: I've just seen your PR : #298, great!

[scraly]

thanks both of you :)