Update dependency org.jenkins-ci.main:jenkins-test-harness to v2451 (#10666)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

test/pom.xml

@@ -183,7 +183,7 @@ THE SOFTWARE.
     <dependency>
       <groupId>org.jenkins-ci.main</groupId>
       <artifactId>jenkins-test-harness</artifactId>
-      <version>2447.v8a_ce9e0fca_32</version>
+      <version>2451.v7538d021657d</version>
       <scope>test</scope>
       <exclusions>
         <exclusion>