chore(deps): update gradle shadow packages to v8.3.4

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.gradleup.shadow:shadow-gradle-plugin	8.3.3 -> 8.3.4
com.gradleup.shadow	8.3.3 -> 8.3.4

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Release Notes

GradleUp/shadow (com.gradleup.shadow:shadow-gradle-plugin)

v8.3.4

Compare Source

Fixed

• Apply legacy plugin last, and declare capabilities for old plugins, fixes #​964. (#​991)

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