v4.0.6 Release

[Unreleased]

[v4.0.6] - 2021-06-15

Chore

• d169414: v4.0.6 changelog bump
• 73adee2: bump claircore to v0.1.26

Cicd

• cd64d3f: changelog fixups

Clairctl

• f745d45: add support for s3 registries using V4
• Fixes #1264
  [Unreleased]: v4.0.6...HEAD
  [v4.0.6]: v4.0.5...v4.0.6