Bump jenkins-core from 2.286 to 2.287

Bumps [jenkins-core](https://github.com/jenkinsci/pom) from 2.286 to 2.287.
- [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>

pom.xml

@@ -88,7 +88,7 @@
     <dependency>
       <groupId>org.jenkins-ci.main</groupId>
       <artifactId>jenkins-core</artifactId>
-      <version>2.286</version> <!-- for ACL.impersonate2() and acegi to Spring Security conversion -->
+      <version>2.287</version> <!-- for ACL.impersonate2() and acegi to Spring Security conversion -->
     </dependency>
     <dependency>
       <groupId>javax.servlet</groupId>