docs: Link in Readme/GitHub Action 404s

[jennifer-shehane]

This link in the Readme 404s, not sure where it's supposed to point to exactly, but I'd like to know because I wanted to see demo examples. 🙈 https://github.com/atlassian/gajira-demo - this actually 404s on all of y'alls github actions readmes.

[marswed]

Me too . I'm getting the same error https://github.com/atlassian/gajira-demo