[JENKINS-48347] - Update WinP from 1.25 to 1.26 to pick the Weblogic classloader fix for WinP DLLs

[oleg-nenashev]

This patch integrates the jenkinsci/winp#47 fix for JENKINS-48347. This fix has been created by @bcastellucci a while ago, but it took a while for me to spin the release due to the Windows environment issues. I hope to automate releases at some point like I did for WinSW

Full diff: jenkinsci/winp@winp-1.25...winp-1.26

Proposed changelog entries

• Bug: WinP 1.26: Fix loading of Windows Process Management libraries on Jenkins masters running inside the Weblogic web container
  • Changelog: https://github.com/kohsuke/winp/blob/master/CHANGELOG.md#126

Submitter checklist

• JIRA issue is well described
• Changelog entry appropriate for the audience affected by the change (users or developer, depending on the change). Examples
  * Use the Internal: prefix if the change has no user-visible impact (API, test frameworks, etc.)
• Appropriate autotests or explanation to why this change has no tests
• For dependency updates: links to external changelogs and, if possible, full diffs

Desired reviewers

@jenkinsci/code-reviewers

[oleg-nenashev]

@jenkinsci/code-reviewers gentle ping