Bump workflow-api from 2.38 to 2.39

Bumps [workflow-api](https://github.com/jenkinsci/workflow-api-plugin) from 2.38 to 2.39.
- [Release notes](https://github.com/jenkinsci/workflow-api-plugin/releases)
- [Changelog](https://github.com/jenkinsci/workflow-api-plugin/blob/master/CHANGELOG.md)
- [Commits](jenkinsci/workflow-api-plugin@workflow-api-2.38...workflow-api-2.39)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

bom-latest/pom.xml

@@ -13,7 +13,7 @@
         <git-plugin.version>4.0.0</git-plugin.version>
         <scm-api-plugin.version>2.6.3</scm-api-plugin.version>
         <structs-plugin.version>1.20</structs-plugin.version>
-        <workflow-api-plugin.version>2.38</workflow-api-plugin.version>
+        <workflow-api-plugin.version>2.39</workflow-api-plugin.version>
         <workflow-cps-plugin.version>2.78</workflow-cps-plugin.version>
         <workflow-step-api-plugin.version>2.22</workflow-step-api-plugin.version>
         <workflow-support-plugin.version>3.4</workflow-support-plugin.version>