docs: broken link to bonfire ephemeral environments

[eliranmal]

the getting started page (at /docs/antora/modules/usage/pages/getting-started.adoc) links to a broken reference for working with bonfire, in this stanza:

Bonfire is a cli tool used to deploy apps into ephemeral environments. Read about getting started with bonfire on ephemeral environments here

that linked page no longer exists, and there doesn't seem to be any equivalent one on the consoledot.pages docs.

looks like it can be safely replaced with the bonfire repo readme page.

other suggestions (which are probably too general for this purpose):

• IQE testing in ephemeral environments on the redhat engineering docs
• ephemeral environment and service onboarding on the SMQE wiki redhat-source page

[psav]

@gburges Can you take a look at this please?

[eliranmal]

thank you! 🍪