Convert "Is InnerSource Right?" to ASCIIDOC

[rrrutledge]

https://github.com/InnerSourceCommons/InnerSourceLearningPath/blob/main/introduction/08-is-innersource-right.md

Everything else is in ASCIIDOC

[rrrutledge]

See #505

[marshmallowrobot]

PR approved & merged!

[rrrutledge]

Thank you, @marshmallowrobot ❗️