Bump github-branch-source from 1.9 to 2.11.3

Bumps [github-branch-source](https://github.com/jenkinsci/github-branch-source-plugin) from 1.9 to 2.11.3.
- [Release notes](https://github.com/jenkinsci/github-branch-source-plugin/releases)
- [Changelog](https://github.com/jenkinsci/github-branch-source-plugin/blob/master/CHANGELOG.md)
- [Commits](jenkinsci/github-branch-source-plugin@github-branch-source-1.9...github-branch-source-2.11.3)

---
updated-dependencies:
- dependency-name: org.jenkins-ci.plugins:github-branch-source
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

pom.xml

@@ -113,7 +113,7 @@
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>github-branch-source</artifactId>
-            <version>2.10.4</version>
+            <version>2.11.3</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>