Update serialization.version to v1.7.3 (patch)

[renovate-baret[bot]]

This PR contains the following updates:

Package	Type	Update	Change
org.jetbrains.kotlinx:kotlinx-serialization-core	compile	patch	1.7.2 -> 1.7.3
org.jetbrains.kotlinx:kotlinx-serialization-protobuf	compile	patch	1.7.2 -> 1.7.3

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Release Notes

Kotlin/kotlinx.serialization (org.jetbrains.kotlinx:kotlinx-serialization-core)

### [`v1.7.3`](https://togithub.com/Kotlin/kotlinx.serialization/blob/HEAD/CHANGELOG.md#173--2024-09-19) [Compare Source](https://togithub.com/Kotlin/kotlinx.serialization/compare/v1.7.2...v1.7.3) \================== This release aims to fix important issues that were discovered in the 1.7.2 release, including the inability to sync certain projects into Android Studio/IntelliJ IDEA and exceptions from custom Uuid serializers. It uses Kotlin 2.0.20 by default. - Use explicit kotlin-stdlib and kotlin-test versions from version catalog ([#​2818](https://togithub.com/Kotlin/kotlinx.serialization/issues/2818)) - Drop usage of deprecated Any?.freeze() in K/N target ([#​2819](https://togithub.com/Kotlin/kotlinx.serialization/issues/2819)) - Check against serialName instead of simpleClassName ([#​2802](https://togithub.com/Kotlin/kotlinx.serialization/issues/2802)) - Ignore NoClassDefFoundError when initializing builtins map for serializer() function ([#​2803](https://togithub.com/Kotlin/kotlinx.serialization/issues/2803)) - Clarify example for SerializationException ([#​2806](https://togithub.com/Kotlin/kotlinx.serialization/issues/2806))

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