Update kover to v0.8.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.jetbrains.kotlinx.kover	0.8.0 -> 0.8.1
org.jetbrains.kotlinx:kover-gradle-plugin	0.8.0 -> 0.8.1

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Release Notes

Kotlin/kotlinx-kover (org.jetbrains.kotlinx.kover)

### [`v0.8.1`](https://togithub.com/Kotlin/kotlinx-kover/blob/HEAD/CHANGELOG.md#081--2024-06-07) \=================== #### Kover Gradle Plugin ##### Features - [`#600`](https://togithub.com/Kotlin/kotlinx-kover/issues/600) Apply recommendations for improving DSL - Added DSL to copy one report variant ##### Bugfixes - [`#610`](https://togithub.com/Kotlin/kotlinx-kover/issues/610) Fixed `KoverCriticalException` with a certain order of applying of plugins

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Configuration

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```diff @@ Coverage Diff @@ ## main #301 +/- ## ======================================= Coverage ? 89.34% ======================================= Files ? 20 Lines ? 676 Branches ? 72 ======================================= Hits ? 604 Misses ? 49 Partials ? 23 ```

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