jenkins: upgrade to 2.426.3

This upgrades to 2.426.3 to address
https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-3314

Signed-off-by: Kelley Spoon <kelley.spoon@linaro.org>
Change-Id: Ib00e6b04b53550387b7f50b52b67aa6cfc8717c9
2 files changed