Update kotlinCompileTesting to v0.5.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
dev.zacsweers.kctfork:ksp	0.5.0 -> 0.5.1
dev.zacsweers.kctfork:core	0.5.0 -> 0.5.1

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Release Notes

zacsweers/kotlin-compile-testing (dev.zacsweers.kctfork:ksp)

v0.5.1

Compare Source

2024-06-05

• New: Capture diagnostics with a severity level. This allows the output to be more easily filtered after the fact.

Special thanks to @​evant for contributing to this release!

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