[MNG-8723] Bump org.eclipse.jetty:jetty-server in /its/core-it-suite (#2305)

Bumps org.eclipse.jetty:jetty-server from 9.4.55.v20240627 to 9.4.56.v20240826.

---
updated-dependencies:
- dependency-name: org.eclipse.jetty:jetty-server
  dependency-version: 9.4.56.v20240826
  dependency-type: direct:production
...

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

Author: dependabot[bot]

its/core-it-suite/pom.xml

@@ -77,7 +77,7 @@ under the License.
     <proxy.user />
     <proxy.pass />
     <proxy.nonProxyHosts>localhost</proxy.nonProxyHosts>
-    <jetty9Version>9.4.55.v20240627</jetty9Version>
+    <jetty9Version>9.4.56.v20240826</jetty9Version>
 
     <stubPluginVersion>0.1-stub-SNAPSHOT</stubPluginVersion>
   </properties>