Update coroutine to v1.7.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.jetbrains.kotlinx:kotlinx-coroutines-rx2	1.7.0 -> 1.7.1
org.jetbrains.kotlinx:kotlinx-coroutines-test	1.7.0 -> 1.7.1

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Release Notes

Kotlin/kotlinx.coroutines

### [`v1.7.1`](https://togithub.com/Kotlin/kotlinx.coroutines/blob/HEAD/CHANGES.md#Version-171) [Compare Source](https://togithub.com/Kotlin/kotlinx.coroutines/compare/1.7.0...1.7.1) ##### Bug fixes and improvements - Special characters in coroutine names in JSON dumps are supported ([#​3747](https://togithub.com/Kotlin/kotlinx.coroutines/issues/3747)) - The binary compatibility of the experimental overload of `runTest` is restored ([#​3673](https://togithub.com/Kotlin/kotlinx.coroutines/issues/3673)) - Channels that don't use `onUndeliveredElement` now allocate less memory ([#​3646](https://togithub.com/Kotlin/kotlinx.coroutines/issues/3646))

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