Bump org.slf4j:slf4j-simple from 2.0.15 to 2.0.16 in /java-gradle

Bumps org.slf4j:slf4j-simple from 2.0.15 to 2.0.16.

---
updated-dependencies:
- dependency-name: org.slf4j:slf4j-simple
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

java-gradle/build.gradle

@@ -11,7 +11,7 @@ repositories {
 
 dependencies {
     implementation 'com.rabbitmq:amqp-client:5.21.0'
-    implementation 'org.slf4j:slf4j-simple:2.0.15'
+    implementation 'org.slf4j:slf4j-simple:2.0.16'
     testImplementation 'org.assertj:assertj-core:3.26.3'
     testImplementation 'org.mockito:mockito-core:5.12.0'
     testImplementation 'io.dropwizard.metrics:metrics-core:4.2.26'