Update Workhorse version to 8.54.0

What does this MR do?

Updates Workhorse version: https://gitlab.com/gitlab-org/gitlab-workhorse/-/tags/v8.54.0

Workhorse Changelog:

## v8.54.0

### Changed
- Don't reject image scaling requests based on file extension/format mismatch
  https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/651

### Other
- Rework image scaler test suite
  https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/
- Adjust image scaling latency buckets
  https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/643
- Update raven-go and gocertifi packages
  https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/644
- jaeger: limit operation cardinality by using route regex
  https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/648

### Performance
- Add support for conditional GETs for rescaled images
  https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/647

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• [-] Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

N/A

Security

N/A