[renovate epic] Adds standardized upstream release notes section to README

General MR

Summary

Part of the Automate Renovate Ticket Workflow epic, specifically renovate-runner!30.

Links to upstream release notes from a standardized spot in our README. This section should be linked automatically in future renovate tickets to improve the developer experience.

Relevant logs/screenshots

N/A

Linked Issue

• Part of big-bang/pipeline-templates/renovate-runner#30 (closed)
• Depends on big-bang/pipeline-templates/pipeline-templates!645 (merged) being merged first.

Upgrade Notices

N/A