Update plugin com.google.devtools.ksp to v2.0.0-RC2-1.0.20

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.devtools.ksp (source)	2.0.0-RC1-1.0.20 -> 2.0.0-RC2-1.0.20

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Release Notes

google/ksp (com.google.devtools.ksp)

### [`v2.0.0-RC2-1.0.20`](https://togithub.com/google/ksp/releases/tag/2.0.0-RC2-1.0.20) [Compare Source](https://togithub.com/google/ksp/compare/2.0.0-RC1-1.0.20...2.0.0-RC2-1.0.20) KSP 1.0.20 for Kotlin 2.0.0-RC2

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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