Update dependency org.jetbrains.kotlinx:kotlinx-serialization-json-okio to v1.8.1 (#2021)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[org.jetbrains.kotlinx:kotlinx-serialization-json-okio](https://redirect.github.com/Kotlin/kotlinx.serialization)
| dependencies | patch | `1.8.0` -> `1.8.1` |

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### Release Notes

<details>
<summary>Kotlin/kotlinx.serialization
(org.jetbrains.kotlinx:kotlinx-serialization-json-okio)</summary>

###
[`v1.8.1`](https://redirect.github.com/Kotlin/kotlinx.serialization/blob/HEAD/CHANGELOG.md#181--2025-03-31)

\==================

This release updates Kotlin version to 2.1.20, while also providing
several important improvements
and bugfixes.

#### Improvements

- Implemented encoding null in key and value of a map in Protobuf
([#&#8203;2910](https://redirect.github.com/Kotlin/kotlinx.serialization/issues/2910))
- Make type argument in JsonTransformingSerializer nullable
([#&#8203;2911](https://redirect.github.com/Kotlin/kotlinx.serialization/issues/2911))
- Use SPDX identifier in POMs
([#&#8203;2936](https://redirect.github.com/Kotlin/kotlinx.serialization/issues/2936))
(thanks to [Leon Linhart](https://redirect.github.com/TheMrMilchmann))
- Add watchosDeviceArm64 to Okio integration module
([#&#8203;2920](https://redirect.github.com/Kotlin/kotlinx.serialization/issues/2920))
(thanks to [Daniel Santiago](https://redirect.github.com/danysantiago))
- Update kotlinx-io version to 0.6.0
([#&#8203;2933](https://redirect.github.com/Kotlin/kotlinx.serialization/issues/2933))
(thanks to [Piotr Krzemiński](https://redirect.github.com/krzema12))

#### Bugfixes

- Fix incorrect enum coercion during deserialization from JsonElement
([#&#8203;2962](https://redirect.github.com/Kotlin/kotlinx.serialization/issues/2962))
- Supply proper equals(), hashCode(), and toString() for
SerialDescriptor() wrapper
([#&#8203;2942](https://redirect.github.com/Kotlin/kotlinx.serialization/issues/2942))
- Do not encode empty packed collections in protobuf
([#&#8203;2907](https://redirect.github.com/Kotlin/kotlinx.serialization/issues/2907))

</details>

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Author: slack-oss-bot

gradle/libs.versions.toml

@@ -32,7 +32,7 @@ kotlinInject = "0.7.2"
 kotlinInject-anvil = "0.1.2"
 kotlinpoet = "2.1.0"
 kotlinx-coroutines = "1.10.1"
-kotlinx-serialization = "1.8.0"
+kotlinx-serialization = "1.8.1"
 ksp = "2.1.10-1.0.31"
 ktfmt = "0.54"
 ktor = "3.1.2"