Update ksp to v1.9.23-1.0.20

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.devtools.ksp (source)	1.9.23-1.0.19 -> 1.9.23-1.0.20
com.google.devtools.ksp:symbol-processing-api (source)	1.9.23-1.0.19 -> 1.9.23-1.0.20
com.google.devtools.ksp:symbol-processing (source)	1.9.23-1.0.19 -> 1.9.23-1.0.20

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Release Notes

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

### [`v1.9.23-1.0.20`](https://togithub.com/google/ksp/releases/tag/1.9.23-1.0.20) [Compare Source](https://togithub.com/google/ksp/compare/1.9.23-1.0.19...1.9.23-1.0.20) ##### KSP1 issues fixed - performance optimization for certain workload consists of heavy Java files, including - Replace IdKey's impl with identityHashCode [#​1804](https://togithub.com/google/ksp/issues/1804) - Cache enclosed descriptors by name [#​1808](https://togithub.com/google/ksp/issues/1808) - Add excludedSources to the KSP extension object [#​1793](https://togithub.com/google/ksp/issues/1793) thanks to [@​bitspittle](https://togithub.com/bitspittle) ##### KSP2 issues fixed - NoClassDefFoundError for LZ4Factory when trying KSP2 [#​1713](https://togithub.com/google/ksp/issues/1713) - Calling KSType.replace() with original arguments results in [#​1807](https://togithub.com/google/ksp/issues/1807) - Static fields in base class appear in derived classes [#​1744](https://togithub.com/google/ksp/issues/1744) - fix backing field checking for top level callables - support sealed inheritors lookup. - support type alias for getSymbolsWithAnnotation - support more types for reference elements

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