Excavator: Upgrades Baseline to the latest version

[svc-excavator-bot]

excavator is a bot for automating changes across repositories.

Changes produced by the roomba/latest-baseline-oss check.

Release Notes

2.28.0

Type	Description	Link
Improvement	Implement FinalClass error prone check, replacing the checkstyle implementation	palantir/gradle-baseline#1008
Improvement	Error prone validation to avoid redundant modifiers	palantir/gradle-baseline#1010

2.28.1

Type	Description	Link
Fix	Fix RedundantModifier interpretation of implicit modifiers	palantir/gradle-baseline#1014

2.28.2

Type	Description	Link
Fix	Fix RedundantModifier failures types nested in interfaces	palantir/gradle-baseline#1017

2.28.3

Type	Description	Link
Fix	Fix error-prone mathcing literal null as a subtype. The most common issue this fixes is failures on SafeArg.of("name", null) assuming that the null literal value parameter may be a throwable.	palantir/gradle-baseline#1020

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[carterkozak]

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