chore(deps): update plugin shadowjar to v9.4.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
com.gradleup.shadow	9.3.2 → 9.4.1

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Release Notes

GradleUp/shadow (com.gradleup.shadow)

v9.4.1

Compare Source

Changed

• Update Kotlin to 2.3.20. (#​1978)

v9.4.0

Compare Source

Added

• Support Isolated Projects. (#​1139)

Changed

• Allow opting out of adding shadowJar into assemble lifecycle. (#​1939)

  shadow {
    // Disable making `assemble` task depend on `shadowJar`. This is enabled by default.
    addShadowJarToAssembleLifecycle = false
  }

• Stop catching ZipException when writing entries. (#​1970)

Fixed

• Fix interaction with Gradle artifact transforms. (#​1345)
• Fix skipStringConstants per-relocator behavior in mapName. (#​1968)
• Fix failing for non-existent class directories. (#​1976)

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