Bump undertow.version from 2.0.25.Final to 2.0.26.Final
Bump undertow.version from 2.0.25.Final to 2.0.26.Final

Bumps `undertow.version` from 2.0.25.Final to 2.0.26.Final.

Updates `undertow-core` from 2.0.25.Final to 2.0.26.Final
- [Release notes](https://github.com/undertow-io/undertow/releases)
- [Commits](https://github.com/undertow-io/undertow/compare/2.0.25.Final...2.0.26.Final)

Updates `undertow-servlet` from 2.0.25.Final to 2.0.26.Final
- [Release notes](https://github.com/undertow-io/undertow/releases)
- [Commits](https://github.com/undertow-io/undertow/compare/2.0.25.Final...2.0.26.Final)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
aspectran/aspectran,aspectran/aspectran