Bump org.jenkins-ci.main:jenkins-core from 2.477 to 2.478

Bumps [org.jenkins-ci.main:jenkins-core](https://github.com/jenkinsci/jenkins) from 2.477 to 2.478.
- [Release notes](https://github.com/jenkinsci/jenkins/releases)
- [Commits](jenkinsci/jenkins@jenkins-2.477...jenkins-2.478)

---
updated-dependencies:
- dependency-name: org.jenkins-ci.main:jenkins-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

ui-tests/pom.xml

@@ -16,7 +16,7 @@
   <name>UI Tests of Warnings Plugin</name>
 
   <properties>
-    <jenkins.version>2.477</jenkins.version>
+    <jenkins.version>2.478</jenkins.version>
     <hpi-plugin.version>3.58</hpi-plugin.version>
     <json-smart.version>2.3</json-smart.version>
     <json-unit-assertj.version>2.40.0</json-unit-assertj.version>