Bump bom-2.222.x from 19 to 20

Bumps [bom-2.222.x](https://github.com/jenkinsci/pom) from 19 to 20.
- [Release notes](https://github.com/jenkinsci/pom/releases)
- [Changelog](https://github.com/jenkinsci/pom/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jenkinsci/pom/commits)

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

Author: dependabot[bot]

pom.xml

@@ -283,7 +283,7 @@
       <dependency>
         <groupId>io.jenkins.tools.bom</groupId>
         <artifactId>bom-2.222.x</artifactId>
-        <version>19</version>
+        <version>20</version>
         <scope>import</scope>
         <type>pom</type>
       </dependency>