chore(deps): update bcgov/action-builder-ghcr action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
bcgov/action-builder-ghcr	action	major	v3.0.1 -> v4.0.0

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Release Notes

bcgov/action-builder-ghcr (bcgov/action-builder-ghcr)

v4.0.0

Compare Source

Breaking Change

Unless the attestations and id-token workflow permissions are added attestations will not be created!

permissions:
  attestations: write  # Required for creating attestations
  id-token: write      # Required for OIDC token generation
  packages: write      # This one is has always been required

What's Changed

• chore(ci): drop pins for docker org, trusted by @​DerekRoberts in https://github.com/bcgov/action-builder-ghcr/pull/87
• feat: sbom by @​DerekRoberts in https://github.com/bcgov/action-builder-ghcr/pull/88
• feat: attestations by @​DerekRoberts in https://github.com/bcgov/action-builder-ghcr/pull/89

Full Changelog: bcgov/action-builder-ghcr@v3.0.1...v4.0.0

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