Update dependency org.jenkins-ci.main:jenkins-test-harness to v2529 (#6044)

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

Author: renovate[bot]

pct.sh

@@ -21,7 +21,7 @@ if ! [[ $PLUGINS =~ blueocean || $PLUGINS =~ lockable-resources || $PLUGINS =~ p
 fi
 
 # Tracked by .github/renovate.json
-JTH_VERSION=2520.v0559e74fcf96
+JTH_VERSION=2529.vdcfb_a_c3e53a_0
 if [[ $LINE == weekly ]]; then
 	PCT_D_ARGS+="-Djenkins-test-harness.version=${JTH_VERSION} "
 fi