Bump ant from 1.2 to 1.11

Bumps [ant](https://github.com/jenkinsci/ant-plugin) from 1.2 to 1.11.
- [Release notes](https://github.com/jenkinsci/ant-plugin/releases)
- [Changelog](https://github.com/jenkinsci/ant-plugin/blob/master/docs/old-changelog.md)
- [Commits](jenkinsci/ant-plugin@ant-1.2...ant-1.11)

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

pom.xml

@@ -51,7 +51,7 @@
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>ant</artifactId>
-            <version>1.2</version>
+            <version>1.11</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>