Bump org.eclipse.jetty:jetty-bom in /data-prepper-plugins/s3-source

Bumps [org.eclipse.jetty:jetty-bom](https://github.com/jetty/jetty.project) from 11.0.20 to 12.0.7.
- [Release notes](https://github.com/jetty/jetty.project/releases)
- [Commits](jetty/jetty.project@jetty-11.0.20...jetty-12.0.7)

---
updated-dependencies:
- dependency-name: org.eclipse.jetty:jetty-bom
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

data-prepper-plugins/s3-source/build.gradle

@@ -32,7 +32,7 @@ dependencies {
     implementation 'org.apache.httpcomponents:httpcore:4.4.16'
     testImplementation libs.commons.lang3
     testImplementation 'org.wiremock:wiremock:3.4.2'
-    testImplementation 'org.eclipse.jetty:jetty-bom:11.0.20'
+    testImplementation 'org.eclipse.jetty:jetty-bom:12.0.7'
     testImplementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-yaml'
     testImplementation testLibs.junit.vintage
     testImplementation project(':data-prepper-test-common')