Excavator: Upgrades Baseline to the latest version (#472)

###### _excavator_ is a bot for automating changes across repositories.

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

# Release Notes
## 4.89.0
| Type | Description | Link |
| ---- | ----------- | ---- |
| Improvement | Add known safety-passthrough methods | palantir/gradle-baseline#2159 |


## 4.90.0
| Type | Description | Link |
| ---- | ----------- | ---- |
| Improvement | Validate annotated variable and field assignment safety | palantir/gradle-baseline#2160 |



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build.gradle

@@ -7,7 +7,7 @@ buildscript {
     dependencies {
         classpath 'com.palantir.gradle.externalpublish:gradle-external-publish-plugin:1.11.0'
         classpath 'com.gradle.publish:plugin-publish-plugin:0.20.0'
-        classpath 'com.palantir.baseline:gradle-baseline-java:4.88.0'
+        classpath 'com.palantir.baseline:gradle-baseline-java:4.90.0'
         classpath 'com.palantir.gradle.conjure:gradle-conjure:5.22.0'
         classpath 'com.palantir.gradle.consistentversions:gradle-consistent-versions:2.9.0'
         classpath 'com.palantir.gradle.gitversion:gradle-git-version:0.14.0'