fix: pull in recent tag of sheepdog

[george42-ctds]

Jira Ticket: PPS-629

New Features

Breaking Changes

Bug Fixes

Improvements

Dependency updates

• Re-add sheepdog, v5.1.2, with upgraded flask
• gen3dictionary to 2.0.3

Deployment changes

[github-actions[bot]]

The style in this PR agrees with black. :heavy_check_mark:

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