Bump io.jenkins.tools.bom:bom-2.426.x

Bumps [io.jenkins.tools.bom:bom-2.426.x](https://github.com/jenkinsci/bom) from 2815.vf5d6f093b_23e to 2839.v003b_4d9d24fd.
- [Release notes](https://github.com/jenkinsci/bom/releases)
- [Commits](https://github.com/jenkinsci/bom/commits)

---
updated-dependencies:
- dependency-name: io.jenkins.tools.bom:bom-2.426.x
  dependency-type: direct:production
...

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

pom.xml

@@ -75,7 +75,7 @@
       <dependency>
         <groupId>io.jenkins.tools.bom</groupId>
         <artifactId>bom-${jenkins.baseline}.x</artifactId>
-        <version>2815.vf5d6f093b_23e</version>
+        <version>2839.v003b_4d9d24fd</version>
         <scope>import</scope>
         <type>pom</type>
       </dependency>