[docs-scanner] Outdated SwarmKit repository link in task states documentation

[docker-agent]

File: content/manuals/engine/swarm/how-swarm-mode-works/swarm-task-states.md

Issue

The "Where to go next" section links to the old SwarmKit repository location:

• Learn about swarm tasks

The SwarmKit repository has moved from docker/swarmkit to moby/swarmkit. The current link returns a 301 redirect, but the documentation should reference the correct, current location.

Suggested fix

Update the link to point to the current repository:

- [Learn about swarm tasks](https://github.com/moby/swarmkit/blob/master/design/task_model.md)

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Found by nightly documentation freshness scanner