Bump the atlassian group across 1 directory with 4 updates

Bumps the atlassian group with 4 updates in the / directory: [com.atlassian.plugins:atlassian-plugins-core](https://bitbucket.org/atlassian/atlassian-plugins), [com.atlassian.jira:jira-rest-java-client-api](https://bitbucket.org/atlassian/jira-rest-java-client), [com.atlassian.jira:jira-rest-java-client-core](https://bitbucket.org/atlassian/jira-rest-java-client) and [io.atlassian.util.concurrent:atlassian-util-concurrent](https://bitbucket.org/atlassian/atlassian-util-concurrent).


Updates `com.atlassian.plugins:atlassian-plugins-core` from 5.3.12 to 8.1.0
- [Changelog](https://bitbucket.org/atlassian/atlassian-plugins/src/master/CHANGELOG.md)
- [Commits](https://bitbucket.org/atlassian/atlassian-plugins/branches/compare/atlassian-plugins-parent-8.1.0..atlassian-plugins-parent-5.3.12)

Updates `com.atlassian.jira:jira-rest-java-client-api` from 5.2.7 to 6.0.1
- [Commits](https://bitbucket.org/atlassian/jira-rest-java-client/branches/compare/jira-rest-java-client-parent-6.0.1..jira-rest-java-client-parent-5.2.7)

Updates `com.atlassian.jira:jira-rest-java-client-core` from 5.2.7 to 6.0.1
- [Commits](https://bitbucket.org/atlassian/jira-rest-java-client/branches/compare/jira-rest-java-client-parent-6.0.1..jira-rest-java-client-parent-5.2.7)

Updates `com.atlassian.jira:jira-rest-java-client-core` from 5.2.7 to 6.0.1
- [Commits](https://bitbucket.org/atlassian/jira-rest-java-client/branches/compare/jira-rest-java-client-parent-6.0.1..jira-rest-java-client-parent-5.2.7)

Updates `io.atlassian.util.concurrent:atlassian-util-concurrent` from 4.0.1 to 4.1.0
- [Changelog](https://bitbucket.org/atlassian/atlassian-util-concurrent/src/master/changelog.md)
- [Commits](https://bitbucket.org/atlassian/atlassian-util-concurrent/branches/compare/atlassian-util-concurrent-4.1.0..atlassian-util-concurrent-4.0.1)

---
updated-dependencies:
- dependency-name: com.atlassian.plugins:atlassian-plugins-core
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: atlassian
- dependency-name: com.atlassian.jira:jira-rest-java-client-api
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: atlassian
- dependency-name: com.atlassian.jira:jira-rest-java-client-core
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: atlassian
- dependency-name: com.atlassian.jira:jira-rest-java-client-core
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: atlassian
- dependency-name: io.atlassian.util.concurrent:atlassian-util-concurrent
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: atlassian
...

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

pom.xml

@@ -50,7 +50,7 @@
     <revision>3.14</revision>
     <changelist>-SNAPSHOT</changelist>
     <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
-    <jira-rest-client.version>5.2.7</jira-rest-client.version>
+    <jira-rest-client.version>6.0.1</jira-rest-client.version>
     <fugue.version>4.7.2</fugue.version>
     <!-- https://www.jenkins.io/doc/developer/plugin-development/choosing-jenkins-baseline/ -->
     <jenkins.baseline>2.479</jenkins.baseline>
@@ -70,7 +70,7 @@
       <dependency>
         <groupId>com.atlassian.plugins</groupId>
         <artifactId>atlassian-plugins-core</artifactId>
-        <version>5.3.12</version>
+        <version>8.1.0</version>
       </dependency>
     </dependencies>
   </dependencyManagement>
@@ -212,7 +212,7 @@
     <dependency>
       <groupId>io.atlassian.util.concurrent</groupId>
       <artifactId>atlassian-util-concurrent</artifactId>
-      <version>4.0.1</version>
+      <version>4.1.0</version>
     </dependency>
     <dependency>
       <groupId>io.jenkins.plugins</groupId>