RHDEVDOCS-4169 Document Tekton Hub changes for Pipelines 1.8

[sounix000]

• Aligned team: Dev Tools
• OCP version for cherry-picking: enterprise-4.9, enterprise-4.10, enterprise-4.11
• JIRA issues: RHDEVDOCS-4169 Document Tekton Hub changes for Pipelines 1.8
• Preview pages: coming soon
• SME review: @PuneetPunamiya
• Peer-review: TBD

[rolfedh]

/assign @PuneetPunamiya

[ocpdocs-previewbot]

🤖 Updated build preview is available at: https://48671--docspreview.netlify.app

Build log: https://circleci.com/gh/ocpdocs-previewbot/openshift-docs/3001

[sounix000]

@PuneetPunamiya : Addressed your comments. PTAL.

[PuneetPunamiya]

LGTM

[sounix000]

Self-reviewed according to OpenShift docs peer review checklist for writers.

[ppitonak]

/lgtm

[bburt-rh]

/cherrypick enterprise-4.11

[bburt-rh]

/cherrypick enterprise-4.12

[openshift-cherrypick-robot]

@bburt-rh: new pull request created: #52505

In response to this:

/cherrypick enterprise-4.11

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[openshift-cherrypick-robot]

@bburt-rh: new pull request created: #52506

In response to this:

/cherrypick enterprise-4.12

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.