Update dependency node to v20.18.3 (jenkinsci#397)

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

Author: renovate[bot]

pom.xml

@@ -61,7 +61,7 @@ THE SOFTWARE.
     <!-- https://www.jenkins.io/doc/developer/plugin-development/choosing-jenkins-baseline/ -->
     <jenkins.baseline>2.479</jenkins.baseline>
     <jenkins.version>2.496</jenkins.version>
-    <node.version>20.18.1</node.version>
+    <node.version>20.18.3</node.version>
     <npm.version>10.9.2</npm.version>
     <spotless.check.skip>false</spotless.check.skip>
   </properties>