backstage release v2.84.0

Added

• (chart) Add architecture and tolerations to run the pod on arm64 in #2702 by @marians

Changed

• (deps) Update node.js to v24.21.0 in #2692 by @renovate[bot]
• (deps) Update storybook monorepo to v10.6.0 in #2700 by @renovate[bot]

Full Changelog: https://github.com/giantswarm/backstage/compare/v2.83.3...v2.84.0