feat: set date of workshop

[marcoklein]

closes #303

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 13c036904caaef8079f6bf6eca39801ba98417f7

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

| Name | Type | | --------------------- | ----- | | impromat-api | Minor | | impromat | Minor | | impromat-app-renderer | Patch |

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