Bump io.jenkins.tools.bom:bom-2.504.x

Bumps [io.jenkins.tools.bom:bom-2.504.x](https://github.com/jenkinsci/bom) from 4740.v75a_90f6fefb_7 to 4770.v9a_2b_7a_9d8b_7f.
- [Release notes](https://github.com/jenkinsci/bom/releases)
- [Commits](https://github.com/jenkinsci/bom/commits)

---
updated-dependencies:
- dependency-name: io.jenkins.tools.bom:bom-2.504.x
  dependency-version: 4770.v9a_2b_7a_9d8b_7f
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -68,7 +68,7 @@
             <dependency>
                 <groupId>io.jenkins.tools.bom</groupId>
                 <artifactId>bom-${jenkins.baseline}.x</artifactId>
-                <version>4740.v75a_90f6fefb_7</version>
+                <version>4770.v9a_2b_7a_9d8b_7f</version>
                 <scope>import</scope>
                 <type>pom</type>
             </dependency>