Create a 1.1.0 release

[scottrigby]

See https://github.com/open-gitops/documents/milestone/9

Note that it impacts all places where we currently link to v1.0.0

• project repo README
• this repo README
• website opengitops.dev
• badge for ADOPTERS.md in project repo

to-do:

• scan all other references in this github org
• make social media post after tag is cut