Highlight Composition Revision/Best Practices

[tr0njavolta]

What's Missing?

From thread

TL;DR - After a customer stands up some control planes and teams are using Upbound for their infra, what should they do when a team needs to change a composition without impacting other teams?

Composition revisions address this issue, but it is not present in the Upbound docs.

Some references to composition versioning exist in the XP architecture framework section, but this could be presented to users clearer/higher in the navigation

### Tasks

[jbw976]

These may be useful resources for this effort:

• https://docs.crossplane.io/knowledge-base/guides/composition-revisions/
• https://docs.crossplane.io/knowledge-base/guides/composition-revisions-example/