Update dependency com.willowtreeapps.assertk:assertk to v0.28.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.willowtreeapps.assertk:assertk	0.28.0 -> 0.28.1

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Release Notes

willowtreeapps/assertk (com.willowtreeapps.assertk:assertk)

### [`v0.28.1`](https://togithub.com/willowtreeapps/assertk/blob/HEAD/CHANGELOG.md#0281-2024-04-17) ##### Added - Added core wasmWasi support, wasmJs to coroutines

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