Bump org.wiremock:wiremock in /data-prepper-plugins/opensearch (#6308)

Bumps [org.wiremock:wiremock](https://github.com/wiremock/wiremock) from 3.10.0 to 3.13.2.
- [Release notes](https://github.com/wiremock/wiremock/releases)
- [Commits](wiremock/wiremock@3.10.0...3.13.2)

---
updated-dependencies:
- dependency-name: org.wiremock:wiremock
  dependency-version: 3.13.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

data-prepper-plugins/opensearch/build.gradle

@@ -47,7 +47,7 @@ dependencies {
     testImplementation 'net.bytebuddy:byte-buddy-agent:1.17.8'
     testImplementation testLibs.slf4j.simple
     testImplementation project(path: ':data-prepper-test:test-common')
-    testImplementation 'org.wiremock:wiremock:3.10.0'
+    testImplementation 'org.wiremock:wiremock:3.13.2'
 }
 
 sourceSets {