Bump bom-2.235.x in /empty-plugin/src/main/resources/archetype-resources

Bumps [bom-2.235.x](https://github.com/jenkinsci/pom) from 13 to 15.
- [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] <support@github.com>

empty-plugin/src/main/resources/archetype-resources/pom.xml

@@ -27,7 +27,7 @@
             <dependency>
                 <groupId>io.jenkins.tools.bom</groupId>
                 <artifactId>bom-2.235.x</artifactId>
-                <version>13</version>
+                <version>15</version>
                 <scope>import</scope>
                 <type>pom</type>
             </dependency>