Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

This replaces most mentions of "GitOps Toolkit" and "toolkit" with
"Flux". I have adopted the style of using "Flux v2" in the first
mention, and thereafter just "Flux".

Signed-off-by: Michael Bridgen <michael@weave.works>

Signed-off-by: Hidde Beydals <hello@hidde.co>

	- point out GH discussions
	- move "understanding GOTK" earlier
	- point out dev-guide
	- update reality on calendar invitations