Bump io.jenkins.plugins:warnings-ng from 11.10.0 to 12.6.0

Bumps [io.jenkins.plugins:warnings-ng](https://github.com/jenkinsci/warnings-ng-plugin) from 11.10.0 to 12.6.0.
- [Release notes](https://github.com/jenkinsci/warnings-ng-plugin/releases)
- [Changelog](https://github.com/jenkinsci/warnings-ng-plugin/blob/main/CHANGELOG.md)
- [Commits](jenkinsci/warnings-ng-plugin@v11.10.0...v12.6.0)

---
updated-dependencies:
- dependency-name: io.jenkins.plugins:warnings-ng
  dependency-version: 12.6.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pom.xml

@@ -75,7 +75,7 @@
         <dependency>
             <groupId>io.jenkins.plugins</groupId>
             <artifactId>warnings-ng</artifactId>
-            <version>11.10.0</version>
+            <version>12.6.0</version>
         </dependency>
 
         <dependency>