build(deps-dev): bump org.jenkins-ci.plugins:credentials

Bumps [org.jenkins-ci.plugins:credentials](https://github.com/jenkinsci/credentials-plugin) from 1.19 to 2.6.1.1.
- [Release notes](https://github.com/jenkinsci/credentials-plugin/releases)
- [Changelog](https://github.com/jenkinsci/credentials-plugin/blob/master/CHANGELOG.md)
- [Commits](jenkinsci/credentials-plugin@credentials-1.19...credentials-2.6.1.1)

---
updated-dependencies:
- dependency-name: org.jenkins-ci.plugins:credentials
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

jenkins-pipeline-shared-libraries/pom.xml

@@ -378,7 +378,7 @@
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>credentials</artifactId>
-            <version>1.19</version>
+            <version>2.6.1.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>