chore(deps): bump org.junit:junit-bom in /flipt-java (#359)

Bumps [org.junit:junit-bom](https://github.com/junit-team/junit5) from 5.11.3 to 5.11.4.
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit5@r5.11.3...r5.11.4)

---
updated-dependencies:
- dependency-name: org.junit:junit-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

flipt-java/build.gradle

@@ -25,7 +25,7 @@ java {
 dependencies {
     implementation 'com.fasterxml.jackson.core:jackson-databind:2.18.2'
     implementation 'com.squareup.okhttp3:okhttp:4.12.0'
-    testImplementation platform('org.junit:junit-bom:5.11.3')
+    testImplementation platform('org.junit:junit-bom:5.11.4')
     testImplementation 'org.junit.jupiter:junit-jupiter'
     api 'com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.18.2'
     api 'com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.18.2'