Bump org.apache.httpcomponents.client5:httpclient5 in /e2e-tests

Bumps [org.apache.httpcomponents.client5:httpclient5](https://github.com/apache/httpcomponents-client) from 5.5.1 to 5.6.
- [Changelog](https://github.com/apache/httpcomponents-client/blob/master/RELEASE_NOTES.txt)
- [Commits](apache/httpcomponents-client@rel/v5.5.1...rel/v5.6)

---
updated-dependencies:
- dependency-name: org.apache.httpcomponents.client5:httpclient5
  dependency-version: '5.6'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

e2e-tests/build.gradle

@@ -24,7 +24,7 @@ dependencies {
     testImplementation "org.assertj:assertj-core:3.27.6"
     testImplementation 'ch.qos.logback:logback-classic:1.5.21'
     testImplementation 'org.xmlunit:xmlunit-assertj3:2.11.0'
-    testImplementation 'org.apache.httpcomponents.client5:httpclient5:5.5.1'
+    testImplementation 'org.apache.httpcomponents.client5:httpclient5:5.6'
 }
 
 tasks.withType(Test) {