Bump com.google.guava:guava in /samples/java

Bumps [com.google.guava:guava](https://github.com/google/guava) from 33.3.1-jre to 33.4.0-jre.
- [Release notes](https://github.com/google/guava/releases)
- [Commits](https://github.com/google/guava/commits)

---
updated-dependencies:
- dependency-name: com.google.guava:guava
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

samples/java/build.gradle.kts

@@ -13,7 +13,7 @@ dependencies {
     implementation("com.squareup.okhttp3:okhttp-sse")
     implementation(platform("com.fasterxml.jackson:jackson-bom:2.18.2"))
     implementation("com.fasterxml.jackson.core:jackson-databind:2.18.2")
-    implementation("com.google.guava:guava:33.3.1-jre")
+    implementation("com.google.guava:guava:33.4.0-jre")
 }
 
 java {